CompTIA Network+ N10-009 Cabling Fiber Copper PoE Interfaces And Transceiver Troubleshooting Practice Test

 

Objective 5.2 • 35 original questions

This CompTIA Network+ N10-009 practice test focuses on cabling and physical-interface troubleshooting. All questions are original ExamSnap scenarios aligned to the current N10-009 blueprint; they are not copied from CompTIA exam content. Use the complete N10-009 collection for broader practice across all five domains. For broader exam preparation, review the CompTIA Network+ N10-009 Exam Dumps page.

Instructions: Select the best answer for each question. Review the explanation after answering; each distractor includes a reason it is not the best choice for that scenario.

Question 1

At Litware Manufacturing, a systems administrator is reviewing a network change. The requirement is to diagnose a fiber link where the installed media type does not match the optics/design. Which option is the best fit? The decision applies to a branch-office rollout.

1. Wrong fiber type
2. Runts
3. TX/RX transposed
4. Wrong copper category
5. Attenuation

Correct answer: A

Why: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. This directly satisfies the requirement: diagnose a fiber link where the installed media type does not match the optics/design.

Option review:

A: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. This directly satisfies the requirement: diagnose a fiber link where the installed media type does not match the optics/design.

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where the installed media type does not match the optics/design.

C: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where the installed media type does not match the optics/design.

D: A cable category below the required standard can limit supported speed/distance. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where the installed media type does not match the optics/design.

E: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where the installed media type does not match the optics/design.

Learning point: Use Wrong fiber type when the key requirement is to diagnose a fiber link where the installed media type does not match the optics/design.

Question 2

A ticket at Woodgrove Bank says the team must diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper. Which technology or concept most directly addresses this requirement? The decision applies to a campus refresh.

1. Drops
2. Electromagnetic interference
3. Crosstalk
4. Wrong fiber type
5. Wrong copper category

Correct answer: E

Why: A cable category below the required standard can limit supported speed/distance. This directly satisfies the requirement: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

Option review:

A: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

B: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

C: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

D: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

E: A cable category below the required standard can limit supported speed/distance. This directly satisfies the requirement: diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

Learning point: Use Wrong copper category when the key requirement is to diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

Question 3

During a design meeting at Blue Yonder Airlines, the junior network administrator needs to choose or troubleshoot twisted-pair cabling in an electrically noisy location. What should be selected? The decision applies to a data-center segment.

1. Drops
2. STP vs UTP mismatch/choice
3. Error-disabled port
4. Electromagnetic interference
5. Runts

Correct answer: B

Why: Shielding helps in high-interference environments, while improper grounding/design can create issues. This directly satisfies the requirement: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

Option review:

A: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

B: Shielding helps in high-interference environments, while improper grounding/design can create issues. This directly satisfies the requirement: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

C: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

D: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

E: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: choose or troubleshoot twisted-pair cabling in an electrically noisy location.

Learning point: Use STP vs UTP mismatch/choice when the key requirement is to choose or troubleshoot twisted-pair cabling in an electrically noisy location.

Question 4

Contoso Health is updating its network standard. Which option best meets the need to diagnose errors caused by signal leakage between nearby copper pairs? The decision applies to a remote-site migration.

1. CRC errors
2. Crosstalk
3. Improper termination
4. Low optical signal
5. Suspended port

Correct answer: B

Why: Unwanted coupling between adjacent copper pairs/cables corrupts signals. This directly satisfies the requirement: diagnose errors caused by signal leakage between nearby copper pairs.

Option review:

A: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: diagnose errors caused by signal leakage between nearby copper pairs.

B: Unwanted coupling between adjacent copper pairs/cables corrupts signals. This directly satisfies the requirement: diagnose errors caused by signal leakage between nearby copper pairs.

C: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. However, it does not most directly satisfy the requirement in this scenario: diagnose errors caused by signal leakage between nearby copper pairs.

D: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: diagnose errors caused by signal leakage between nearby copper pairs.

E: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: diagnose errors caused by signal leakage between nearby copper pairs.

Learning point: Use Crosstalk when the key requirement is to diagnose errors caused by signal leakage between nearby copper pairs.

Question 5

A field technician at Litware Manufacturing is validating a proposed solution. The design must diagnose a copper run that becomes unreliable near motors or fluorescent equipment. Which answer is most appropriate? The decision applies to a operations lab.

1. Runts
2. Electromagnetic interference
3. Low optical signal
4. CRC errors
5. Transceiver mismatch

Correct answer: B

Why: External electrical/RF energy can corrupt copper or wireless signals. This directly satisfies the requirement: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

Option review:

A: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

B: External electrical/RF energy can corrupt copper or wireless signals. This directly satisfies the requirement: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

C: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

D: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

E: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

Learning point: Use Electromagnetic interference when the key requirement is to diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

Question 6

For a new deployment at Woodgrove Bank, the networking team wants to diagnose a long cable run whose signal is too weak at the receiver. Which choice most directly satisfies the goal? The decision applies to a production maintenance window.

1. STP vs UTP mismatch/choice
2. TX/RX transposed
3. Attenuation
4. Crosstalk
5. Error-disabled port

Correct answer: C

Why: Signal strength decreases over distance or through poor media/connectors. This directly satisfies the requirement: diagnose a long cable run whose signal is too weak at the receiver.

Option review:

A: Shielding helps in high-interference environments, while improper grounding/design can create issues. However, it does not most directly satisfy the requirement in this scenario: diagnose a long cable run whose signal is too weak at the receiver.

B: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: diagnose a long cable run whose signal is too weak at the receiver.

C: Signal strength decreases over distance or through poor media/connectors. This directly satisfies the requirement: diagnose a long cable run whose signal is too weak at the receiver.

D: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a long cable run whose signal is too weak at the receiver.

E: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: diagnose a long cable run whose signal is too weak at the receiver.

Learning point: Use Attenuation when the key requirement is to diagnose a long cable run whose signal is too weak at the receiver.

Question 7

At Blue Yonder Airlines, a systems administrator is reviewing a network change. The requirement is to diagnose a newly terminated cable that fails certification or works intermittently. Which option is the best fit? The decision applies to a new floor deployment.

1. Improper termination
2. Incorrect PoE standard
3. Administratively down
4. CRC errors
5. Drops

Correct answer: A

Why: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. This directly satisfies the requirement: diagnose a newly terminated cable that fails certification or works intermittently.

Option review:

A: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. This directly satisfies the requirement: diagnose a newly terminated cable that fails certification or works intermittently.

B: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: diagnose a newly terminated cable that fails certification or works intermittently.

C: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: diagnose a newly terminated cable that fails certification or works intermittently.

D: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: diagnose a newly terminated cable that fails certification or works intermittently.

E: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: diagnose a newly terminated cable that fails certification or works intermittently.

Learning point: Use Improper termination when the key requirement is to diagnose a newly terminated cable that fails certification or works intermittently.

Question 8

A ticket at Contoso Health says the team must diagnose a duplex fiber link with light on the wrong strand and no link. Which technology or concept most directly addresses this requirement? The decision applies to a service-recovery review.

1. Giants
2. Crosstalk
3. Runts
4. Suspended port
5. TX/RX transposed

Correct answer: E

Why: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. This directly satisfies the requirement: diagnose a duplex fiber link with light on the wrong strand and no link.

Option review:

A: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: diagnose a duplex fiber link with light on the wrong strand and no link.

B: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a duplex fiber link with light on the wrong strand and no link.

C: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: diagnose a duplex fiber link with light on the wrong strand and no link.

D: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: diagnose a duplex fiber link with light on the wrong strand and no link.

E: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. This directly satisfies the requirement: diagnose a duplex fiber link with light on the wrong strand and no link.

Learning point: Use TX/RX transposed when the key requirement is to diagnose a duplex fiber link with light on the wrong strand and no link.

Question 9

During a design meeting at Litware Manufacturing, the junior network administrator needs to interpret increasing cyclic redundancy check errors on an interface. What should be selected? The decision applies to a branch-office rollout.

1. Attenuation
2. Giants
3. Incorrect PoE standard
4. CRC errors
5. Electromagnetic interference

Correct answer: D

Why: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. This directly satisfies the requirement: interpret increasing cyclic redundancy check errors on an interface.

Option review:

A: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: interpret increasing cyclic redundancy check errors on an interface.

B: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: interpret increasing cyclic redundancy check errors on an interface.

C: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: interpret increasing cyclic redundancy check errors on an interface.

D: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. This directly satisfies the requirement: interpret increasing cyclic redundancy check errors on an interface.

E: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: interpret increasing cyclic redundancy check errors on an interface.

Learning point: Use CRC errors when the key requirement is to interpret increasing cyclic redundancy check errors on an interface.

Question 10

Woodgrove Bank is updating its network standard. Which option best meets the need to interpret an interface counter showing many undersized frames? The decision applies to a campus refresh.

1. Attenuation
2. Runts
3. Low optical signal
4. STP vs UTP mismatch/choice
5. PoE budget exceeded

Correct answer: B

Why: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. This directly satisfies the requirement: interpret an interface counter showing many undersized frames.

Option review:

A: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: interpret an interface counter showing many undersized frames.

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. This directly satisfies the requirement: interpret an interface counter showing many undersized frames.

C: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: interpret an interface counter showing many undersized frames.

D: Shielding helps in high-interference environments, while improper grounding/design can create issues. However, it does not most directly satisfy the requirement in this scenario: interpret an interface counter showing many undersized frames.

E: The switch lacks enough remaining power budget to energize all connected PoE devices. However, it does not most directly satisfy the requirement in this scenario: interpret an interface counter showing many undersized frames.

Learning point: Use Runts when the key requirement is to interpret an interface counter showing many undersized frames.

Question 11

A field technician at Blue Yonder Airlines is validating a proposed solution. The design must interpret interface counters showing oversized Ethernet frames. Which answer is most appropriate? The decision applies to a data-center segment.

1. PoE budget exceeded
2. Low optical signal
3. Giants
4. Crosstalk
5. Administratively down

Correct answer: C

Why: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. This directly satisfies the requirement: interpret interface counters showing oversized Ethernet frames.

Option review:

A: The switch lacks enough remaining power budget to energize all connected PoE devices. However, it does not most directly satisfy the requirement in this scenario: interpret interface counters showing oversized Ethernet frames.

B: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: interpret interface counters showing oversized Ethernet frames.

C: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. This directly satisfies the requirement: interpret interface counters showing oversized Ethernet frames.

D: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: interpret interface counters showing oversized Ethernet frames.

E: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: interpret interface counters showing oversized Ethernet frames.

Learning point: Use Giants when the key requirement is to interpret interface counters showing oversized Ethernet frames.

Question 12

For a new deployment at Contoso Health, the networking team wants to investigate an interface counter showing traffic being discarded. Which choice most directly satisfies the goal? The decision applies to a remote-site migration.

1. Incorrect PoE standard
2. Low optical signal
3. Drops
4. Wrong fiber type
5. PoE budget exceeded

Correct answer: C

Why: Packets/frames may be discarded because of congestion, buffers, errors, or policy. This directly satisfies the requirement: investigate an interface counter showing traffic being discarded.

Option review:

A: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: investigate an interface counter showing traffic being discarded.

B: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: investigate an interface counter showing traffic being discarded.

C: Packets/frames may be discarded because of congestion, buffers, errors, or policy. This directly satisfies the requirement: investigate an interface counter showing traffic being discarded.

D: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: investigate an interface counter showing traffic being discarded.

E: The switch lacks enough remaining power budget to energize all connected PoE devices. However, it does not most directly satisfy the requirement in this scenario: investigate an interface counter showing traffic being discarded.

Learning point: Use Drops when the key requirement is to investigate an interface counter showing traffic being discarded.

Question 13

At Litware Manufacturing, a systems administrator is reviewing a network change. The requirement is to diagnose a switch port placed into an automatic protective shutdown state. Which option is the best fit? The decision applies to a operations lab.

1. Crosstalk
2. Error-disabled port
3. Drops
4. Transceiver mismatch
5. CRC errors

Correct answer: B

Why: A switch may automatically disable a port after a serious policy or link condition. This directly satisfies the requirement: diagnose a switch port placed into an automatic protective shutdown state.

Option review:

A: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a switch port placed into an automatic protective shutdown state.

B: A switch may automatically disable a port after a serious policy or link condition. This directly satisfies the requirement: diagnose a switch port placed into an automatic protective shutdown state.

C: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: diagnose a switch port placed into an automatic protective shutdown state.

D: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: diagnose a switch port placed into an automatic protective shutdown state.

E: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: diagnose a switch port placed into an automatic protective shutdown state.

Learning point: Use Error-disabled port when the key requirement is to diagnose a switch port placed into an automatic protective shutdown state.

Question 14

A ticket at Woodgrove Bank says the team must diagnose a port that is physically fine but explicitly shut down by configuration. Which technology or concept most directly addresses this requirement? The decision applies to a production maintenance window.

1. Wrong fiber type
2. Runts
3. Administratively down
4. Low optical signal
5. Giants

Correct answer: C

Why: The interface is intentionally disabled in configuration. This directly satisfies the requirement: diagnose a port that is physically fine but explicitly shut down by configuration.

Option review:

A: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: diagnose a port that is physically fine but explicitly shut down by configuration.

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: diagnose a port that is physically fine but explicitly shut down by configuration.

C: The interface is intentionally disabled in configuration. This directly satisfies the requirement: diagnose a port that is physically fine but explicitly shut down by configuration.

D: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: diagnose a port that is physically fine but explicitly shut down by configuration.

E: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: diagnose a port that is physically fine but explicitly shut down by configuration.

Learning point: Use Administratively down when the key requirement is to diagnose a port that is physically fine but explicitly shut down by configuration.

Question 15

During a design meeting at Blue Yonder Airlines, the junior network administrator needs to diagnose a member interface that is excluded from a logical aggregation. What should be selected? The decision applies to a new floor deployment.

1. PoE budget exceeded
2. Giants
3. Wrong fiber type
4. Suspended port
5. STP vs UTP mismatch/choice

Correct answer: D

Why: A port may be suspended from a bundle or service because required conditions do not match. This directly satisfies the requirement: diagnose a member interface that is excluded from a logical aggregation.

Option review:

A: The switch lacks enough remaining power budget to energize all connected PoE devices. However, it does not most directly satisfy the requirement in this scenario: diagnose a member interface that is excluded from a logical aggregation.

B: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: diagnose a member interface that is excluded from a logical aggregation.

C: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: diagnose a member interface that is excluded from a logical aggregation.

D: A port may be suspended from a bundle or service because required conditions do not match. This directly satisfies the requirement: diagnose a member interface that is excluded from a logical aggregation.

E: Shielding helps in high-interference environments, while improper grounding/design can create issues. However, it does not most directly satisfy the requirement in this scenario: diagnose a member interface that is excluded from a logical aggregation.

Learning point: Use Suspended port when the key requirement is to diagnose a member interface that is excluded from a logical aggregation.

Question 16

Contoso Health is updating its network standard. Which option best meets the need to diagnose several PoE endpoints where later-connected devices fail to power on? The decision applies to a service-recovery review.

1. PoE budget exceeded
2. Incorrect PoE standard
3. TX/RX transposed
4. Drops
5. STP vs UTP mismatch/choice

Correct answer: A

Why: The switch lacks enough remaining power budget to energize all connected PoE devices. This directly satisfies the requirement: diagnose several PoE endpoints where later-connected devices fail to power on.

Option review:

A: The switch lacks enough remaining power budget to energize all connected PoE devices. This directly satisfies the requirement: diagnose several PoE endpoints where later-connected devices fail to power on.

B: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: diagnose several PoE endpoints where later-connected devices fail to power on.

C: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: diagnose several PoE endpoints where later-connected devices fail to power on.

D: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: diagnose several PoE endpoints where later-connected devices fail to power on.

E: Shielding helps in high-interference environments, while improper grounding/design can create issues. However, it does not most directly satisfy the requirement in this scenario: diagnose several PoE endpoints where later-connected devices fail to power on.

Learning point: Use PoE budget exceeded when the key requirement is to diagnose several PoE endpoints where later-connected devices fail to power on.

Question 17

A field technician at Litware Manufacturing is validating a proposed solution. The design must diagnose a PoE endpoint that requires more power or a different standard than the switch supports. Which answer is most appropriate? The decision applies to a branch-office rollout.

1. Crosstalk
2. Administratively down
3. Giants
4. Incorrect PoE standard
5. Electromagnetic interference

Correct answer: D

Why: A powered device and power sourcing equipment may not support compatible PoE classes/standards. This directly satisfies the requirement: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

Option review:

A: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

B: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

C: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

D: A powered device and power sourcing equipment may not support compatible PoE classes/standards. This directly satisfies the requirement: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

E: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

Learning point: Use Incorrect PoE standard when the key requirement is to diagnose a PoE endpoint that requires more power or a different standard than the switch supports.

Question 18

For a new deployment at Woodgrove Bank, the networking team wants to diagnose a fiber link where installed optics do not match each other or the media. Which choice most directly satisfies the goal? The decision applies to a campus refresh.

1. Attenuation
2. Transceiver mismatch
3. Administratively down
4. TX/RX transposed
5. Giants

Correct answer: B

Why: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. This directly satisfies the requirement: diagnose a fiber link where installed optics do not match each other or the media.

Option review:

A: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where installed optics do not match each other or the media.

B: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. This directly satisfies the requirement: diagnose a fiber link where installed optics do not match each other or the media.

C: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where installed optics do not match each other or the media.

D: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where installed optics do not match each other or the media.

E: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: diagnose a fiber link where installed optics do not match each other or the media.

Learning point: Use Transceiver mismatch when the key requirement is to diagnose a fiber link where installed optics do not match each other or the media.

Question 19

At Blue Yonder Airlines, a systems administrator is reviewing a network change. The requirement is to diagnose an optical link that flaps because received light level is too low. Which option is the best fit? The decision applies to a data-center segment.

1. Suspended port
2. Runts
3. Crosstalk
4. Low optical signal
5. Wrong copper category

Correct answer: D

Why: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. This directly satisfies the requirement: diagnose an optical link that flaps because received light level is too low.

Option review:

A: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: diagnose an optical link that flaps because received light level is too low.

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: diagnose an optical link that flaps because received light level is too low.

C: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: diagnose an optical link that flaps because received light level is too low.

D: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. This directly satisfies the requirement: diagnose an optical link that flaps because received light level is too low.

E: A cable category below the required standard can limit supported speed/distance. However, it does not most directly satisfy the requirement in this scenario: diagnose an optical link that flaps because received light level is too low.

Learning point: Use Low optical signal when the key requirement is to diagnose an optical link that flaps because received light level is too low.

Question 20

During a new floor deployment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link.

1. Error-disabled port
2. Crosstalk
3. Improper termination
4. Wrong fiber type
5. Transceiver mismatch

Correct answer: D

Why: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. This directly satisfies the requirement: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

Option review:

A: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

B: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

C: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. However, it does not most directly satisfy the requirement in this scenario: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

D: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. This directly satisfies the requirement: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

E: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link..

Learning point: Use Wrong fiber type when the key requirement is to diagnose a fiber link where the installed media type does not match the optics/design.

Question 21

During a service-recovery review, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: A cable category below the required standard can limit supported speed/distance.

1. Administratively down
2. Crosstalk
3. Incorrect PoE standard
4. Wrong copper category
5. CRC errors

Correct answer: D

Why: A cable category below the required standard can limit supported speed/distance. This directly satisfies the requirement: A cable category below the required standard can limit supported speed/distance..

Option review:

A: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: A cable category below the required standard can limit supported speed/distance..

B: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: A cable category below the required standard can limit supported speed/distance..

C: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: A cable category below the required standard can limit supported speed/distance..

D: A cable category below the required standard can limit supported speed/distance. This directly satisfies the requirement: A cable category below the required standard can limit supported speed/distance..

E: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: A cable category below the required standard can limit supported speed/distance..

Learning point: Use Wrong copper category when the key requirement is to diagnose a link that cannot reliably support the intended Ethernet speed over the installed copper.

Question 22

During a branch-office rollout, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: Shielding helps in high-interference environments, while improper grounding/design can create issues.

1. Wrong fiber type
2. Error-disabled port
3. STP vs UTP mismatch/choice
4. Incorrect PoE standard
5. Suspended port

Correct answer: C

Why: Shielding helps in high-interference environments, while improper grounding/design can create issues. This directly satisfies the requirement: Shielding helps in high-interference environments, while improper grounding/design can create issues..

Option review:

A: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: Shielding helps in high-interference environments, while improper grounding/design can create issues..

B: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: Shielding helps in high-interference environments, while improper grounding/design can create issues..

C: Shielding helps in high-interference environments, while improper grounding/design can create issues. This directly satisfies the requirement: Shielding helps in high-interference environments, while improper grounding/design can create issues..

D: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: Shielding helps in high-interference environments, while improper grounding/design can create issues..

E: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: Shielding helps in high-interference environments, while improper grounding/design can create issues..

Learning point: Use STP vs UTP mismatch/choice when the key requirement is to choose or troubleshoot twisted-pair cabling in an electrically noisy location.

Question 23

During a campus refresh, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: Unwanted coupling between adjacent copper pairs/cables corrupts signals.

1. Crosstalk
2. Electromagnetic interference
3. Transceiver mismatch
4. TX/RX transposed
5. Runts

Correct answer: A

Why: Unwanted coupling between adjacent copper pairs/cables corrupts signals. This directly satisfies the requirement: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

Option review:

A: Unwanted coupling between adjacent copper pairs/cables corrupts signals. This directly satisfies the requirement: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

B: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

C: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

D: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

E: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: Unwanted coupling between adjacent copper pairs/cables corrupts signals..

Learning point: Use Crosstalk when the key requirement is to diagnose errors caused by signal leakage between nearby copper pairs.

Question 24

During a data-center segment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: External electrical/RF energy can corrupt copper or wireless signals.

1. Giants
2. Attenuation
3. CRC errors
4. Drops
5. Electromagnetic interference

Correct answer: E

Why: External electrical/RF energy can corrupt copper or wireless signals. This directly satisfies the requirement: External electrical/RF energy can corrupt copper or wireless signals..

Option review:

A: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: External electrical/RF energy can corrupt copper or wireless signals..

B: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: External electrical/RF energy can corrupt copper or wireless signals..

C: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: External electrical/RF energy can corrupt copper or wireless signals..

D: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: External electrical/RF energy can corrupt copper or wireless signals..

E: External electrical/RF energy can corrupt copper or wireless signals. This directly satisfies the requirement: External electrical/RF energy can corrupt copper or wireless signals..

Learning point: Use Electromagnetic interference when the key requirement is to diagnose a copper run that becomes unreliable near motors or fluorescent equipment.

Question 25

During a remote-site migration, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: Signal strength decreases over distance or through poor media/connectors.

1. Attenuation
2. Wrong fiber type
3. Suspended port
4. Administratively down
5. Crosstalk

Correct answer: A

Why: Signal strength decreases over distance or through poor media/connectors. This directly satisfies the requirement: Signal strength decreases over distance or through poor media/connectors..

Option review:

A: Signal strength decreases over distance or through poor media/connectors. This directly satisfies the requirement: Signal strength decreases over distance or through poor media/connectors..

B: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: Signal strength decreases over distance or through poor media/connectors..

C: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: Signal strength decreases over distance or through poor media/connectors..

D: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: Signal strength decreases over distance or through poor media/connectors..

E: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: Signal strength decreases over distance or through poor media/connectors..

Learning point: Use Attenuation when the key requirement is to diagnose a long cable run whose signal is too weak at the receiver.

Question 26

During a operations lab, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity.

1. Transceiver mismatch
2. Incorrect PoE standard
3. Wrong copper category
4. Improper termination
5. Suspended port

Correct answer: D

Why: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. This directly satisfies the requirement: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

Option review:

A: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

B: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

C: A cable category below the required standard can limit supported speed/distance. However, it does not most directly satisfy the requirement in this scenario: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

D: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. This directly satisfies the requirement: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

E: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity..

Learning point: Use Improper termination when the key requirement is to diagnose a newly terminated cable that fails certification or works intermittently.

Question 27

During a production maintenance window, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver.

1. TX/RX transposed
2. Improper termination
3. Transceiver mismatch
4. Low optical signal
5. Error-disabled port

Correct answer: A

Why: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. This directly satisfies the requirement: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

Option review:

A: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. This directly satisfies the requirement: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

B: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. However, it does not most directly satisfy the requirement in this scenario: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

C: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

D: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

E: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver..

Learning point: Use TX/RX transposed when the key requirement is to diagnose a duplex fiber link with light on the wrong strand and no link.

Question 28

During a new floor deployment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: Frame checksum failures usually point to corrupted Layer 1/2 transmissions.

1. Transceiver mismatch
2. Wrong fiber type
3. CRC errors
4. Low optical signal
5. Attenuation

Correct answer: C

Why: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. This directly satisfies the requirement: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

Option review:

A: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

B: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

C: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. This directly satisfies the requirement: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

D: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

E: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: Frame checksum failures usually point to corrupted Layer 1/2 transmissions..

Learning point: Use CRC errors when the key requirement is to interpret increasing cyclic redundancy check errors on an interface.

Question 29

During a service-recovery review, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware.

1. Electromagnetic interference
2. Runts
3. CRC errors
4. Administratively down
5. Drops

Correct answer: B

Why: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. This directly satisfies the requirement: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

Option review:

A: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. This directly satisfies the requirement: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

C: Frame checksum failures usually point to corrupted Layer 1/2 transmissions. However, it does not most directly satisfy the requirement in this scenario: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

D: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

E: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware..

Learning point: Use Runts when the key requirement is to interpret an interface counter showing many undersized frames.

Question 30

During a branch-office rollout, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults.

1. Low optical signal
2. Runts
3. Giants
4. Crosstalk
5. Incorrect PoE standard

Correct answer: C

Why: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. This directly satisfies the requirement: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

Option review:

A: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

B: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

C: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. This directly satisfies the requirement: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

D: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

E: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults..

Learning point: Use Giants when the key requirement is to interpret interface counters showing oversized Ethernet frames.

Question 31

During a campus refresh, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: Packets/frames may be discarded because of congestion, buffers, errors, or policy.

1. Transceiver mismatch
2. Giants
3. Electromagnetic interference
4. Runts
5. Drops

Correct answer: E

Why: Packets/frames may be discarded because of congestion, buffers, errors, or policy. This directly satisfies the requirement: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

Option review:

A: Optic type, wavelength, speed, fiber type, or vendor compatibility may not match the link. However, it does not most directly satisfy the requirement in this scenario: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

B: Frames larger than the accepted maximum size can result from MTU/jumbo-frame mismatches or faults. However, it does not most directly satisfy the requirement in this scenario: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

C: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

D: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

E: Packets/frames may be discarded because of congestion, buffers, errors, or policy. This directly satisfies the requirement: Packets/frames may be discarded because of congestion, buffers, errors, or policy..

Learning point: Use Drops when the key requirement is to investigate an interface counter showing traffic being discarded.

Question 32

During a data-center segment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: A switch may automatically disable a port after a serious policy or link condition.

1. Administratively down
2. Error-disabled port
3. TX/RX transposed
4. Wrong fiber type
5. Crosstalk

Correct answer: B

Why: A switch may automatically disable a port after a serious policy or link condition. This directly satisfies the requirement: A switch may automatically disable a port after a serious policy or link condition..

Option review:

A: The interface is intentionally disabled in configuration. However, it does not most directly satisfy the requirement in this scenario: A switch may automatically disable a port after a serious policy or link condition..

B: A switch may automatically disable a port after a serious policy or link condition. This directly satisfies the requirement: A switch may automatically disable a port after a serious policy or link condition..

C: Fiber transmit and receive strands are reversed so each transmitter is not connected to the opposite receiver. However, it does not most directly satisfy the requirement in this scenario: A switch may automatically disable a port after a serious policy or link condition..

D: Using multimode optics/cable where single-mode is required, or vice versa, can prevent or destabilize a link. However, it does not most directly satisfy the requirement in this scenario: A switch may automatically disable a port after a serious policy or link condition..

E: Unwanted coupling between adjacent copper pairs/cables corrupts signals. However, it does not most directly satisfy the requirement in this scenario: A switch may automatically disable a port after a serious policy or link condition..

Learning point: Use Error-disabled port when the key requirement is to diagnose a switch port placed into an automatic protective shutdown state.

Question 33

During a remote-site migration, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: The interface is intentionally disabled in configuration.

1. Wrong copper category
2. Drops
3. Electromagnetic interference
4. Administratively down
5. Improper termination

Correct answer: D

Why: The interface is intentionally disabled in configuration. This directly satisfies the requirement: The interface is intentionally disabled in configuration..

Option review:

A: A cable category below the required standard can limit supported speed/distance. However, it does not most directly satisfy the requirement in this scenario: The interface is intentionally disabled in configuration..

B: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: The interface is intentionally disabled in configuration..

C: External electrical/RF energy can corrupt copper or wireless signals. However, it does not most directly satisfy the requirement in this scenario: The interface is intentionally disabled in configuration..

D: The interface is intentionally disabled in configuration. This directly satisfies the requirement: The interface is intentionally disabled in configuration..

E: Bad pinout, untwisting, connector seating, or fiber termination causes intermittent/no connectivity. However, it does not most directly satisfy the requirement in this scenario: The interface is intentionally disabled in configuration..

Learning point: Use Administratively down when the key requirement is to diagnose a port that is physically fine but explicitly shut down by configuration.

Question 34

During a operations lab, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: A port may be suspended from a bundle or service because required conditions do not match.

1. Wrong copper category
2. Suspended port
3. Runts
4. Drops
5. Attenuation

Correct answer: B

Why: A port may be suspended from a bundle or service because required conditions do not match. This directly satisfies the requirement: A port may be suspended from a bundle or service because required conditions do not match..

Option review:

A: A cable category below the required standard can limit supported speed/distance. However, it does not most directly satisfy the requirement in this scenario: A port may be suspended from a bundle or service because required conditions do not match..

B: A port may be suspended from a bundle or service because required conditions do not match. This directly satisfies the requirement: A port may be suspended from a bundle or service because required conditions do not match..

C: Ethernet frames smaller than the minimum valid size are often associated with collisions or faulty hardware. However, it does not most directly satisfy the requirement in this scenario: A port may be suspended from a bundle or service because required conditions do not match..

D: Packets/frames may be discarded because of congestion, buffers, errors, or policy. However, it does not most directly satisfy the requirement in this scenario: A port may be suspended from a bundle or service because required conditions do not match..

E: Signal strength decreases over distance or through poor media/connectors. However, it does not most directly satisfy the requirement in this scenario: A port may be suspended from a bundle or service because required conditions do not match..

Learning point: Use Suspended port when the key requirement is to diagnose a member interface that is excluded from a logical aggregation.

Question 35

During a production maintenance window, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: The switch lacks enough remaining power budget to energize all connected PoE devices.

1. PoE budget exceeded
2. Low optical signal
3. Suspended port
4. Incorrect PoE standard
5. Error-disabled port

Correct answer: A

Why: The switch lacks enough remaining power budget to energize all connected PoE devices. This directly satisfies the requirement: The switch lacks enough remaining power budget to energize all connected PoE devices..

Option review:

A: The switch lacks enough remaining power budget to energize all connected PoE devices. This directly satisfies the requirement: The switch lacks enough remaining power budget to energize all connected PoE devices..

B: Weak receive power can result from dirty connectors, excessive loss, bends, or distance. However, it does not most directly satisfy the requirement in this scenario: The switch lacks enough remaining power budget to energize all connected PoE devices..

C: A port may be suspended from a bundle or service because required conditions do not match. However, it does not most directly satisfy the requirement in this scenario: The switch lacks enough remaining power budget to energize all connected PoE devices..

D: A powered device and power sourcing equipment may not support compatible PoE classes/standards. However, it does not most directly satisfy the requirement in this scenario: The switch lacks enough remaining power budget to energize all connected PoE devices..

E: A switch may automatically disable a port after a serious policy or link condition. However, it does not most directly satisfy the requirement in this scenario: The switch lacks enough remaining power budget to energize all connected PoE devices..

Learning point: Use PoE budget exceeded when the key requirement is to diagnose several PoE endpoints where later-connected devices fail to power on.