Cisco CCNA 200-301 Interface and Cable Issues Practice Test

Topic 04 focuses on Interface and Cable Issues for the Cisco Certified Network Associate (CCNA) certification and the 200-301 exam, using Cisco networking and Cisco IOS concepts where relevant. For broader exam preparation, review the Cisco CCNA 200-301 Exam Dumps page. Each question includes a concise explanation of the correct answer and the technical reason the other choices are incorrect.

Question 1

What is a link problem where the two ends use different duplex settings, often causing collisions and poor performance?

1. Duplex mismatch
2. Giant
3. Late collision
4. Runt

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Incorrect Answers

Answer B is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer C is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 2

What is a link problem where connected interfaces are configured for incompatible Ethernet speeds?

1. Collision
2. Speed mismatch
3. Err-disabled state
4. Runt

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes a link problem where connected interfaces are configured for incompatible Ethernet speeds.

Incorrect Answers

Answer A is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Answer C is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 3

Which error counter indicates that a received Ethernet frame failed frame check sequence validation?

1. Late collision
2. CRC error
3. Giant
4. Runt

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an error indicating that a received Ethernet frame failed its frame check sequence validation.

Incorrect Answers

Answer A is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 4

Which event is associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time?

1. Giant
2. Speed mismatch
3. Late collision
4. Collision

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer B is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

Answer C is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

 

Question 5

Which collision is detected after the normal Ethernet collision window, often suggesting cabling or duplex problems?

1. Duplex mismatch
2. Err-disabled state
3. Input error
4. Late collision

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Incorrect Answers

Answer A is incorrect because the “Duplex mismatch” option describes a different concept: a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Answer B is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Answer C is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

 

Question 6

Which interface counter records general failures encountered while receiving frames?

1. Giant
2. Runt
3. Output error
4. Input error

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer B is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

 

Question 7

Which interface counter records general failures encountered while transmitting frames?

1. Err-disabled state
2. Giant
3. Output error
4. Late collision

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Incorrect Answers

Answer A is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Answer B is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer D is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

 

Question 8

Which Ethernet frame is smaller than the minimum valid frame size?

1. Runt
2. Collision
3. Speed mismatch
4. Late collision

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes an Ethernet frame that is smaller than the minimum valid frame size.

Incorrect Answers

Answer B is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Answer C is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

Answer D is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

 

Question 9

Which Ethernet frame is larger than the supported maximum frame size for the interface configuration?

1. Collision
2. CRC error
3. Giant
4. Speed mismatch

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Incorrect Answers

Answer A is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Answer B is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer D is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

 

Question 10

What is a protective switch-port state in which IOS disables an interface after detecting certain serious conditions?

1. Err-disabled state
2. Late collision
3. Output error
4. Speed mismatch

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Incorrect Answers

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

 

Question 11

For Duplex mismatch, which statement is accurate?

1. A link problem where the two ends use different duplex settings, often causing collisions and poor performance.
2. A collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.
3. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.
4. A generic interface counter indicating that frames could not be transmitted successfully by an interface.

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Incorrect Answers

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Answer D is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

 

Question 12

For Speed mismatch, which statement is accurate?

1. An error indicating that a received Ethernet frame failed its frame check sequence validation.
2. A link problem where connected interfaces are configured for incompatible Ethernet speeds.
3. A generic interface counter indicating that frames could not be transmitted successfully by an interface.
4. A link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Correct Answer: B

 

Correct Answer

Answer B is correct because it accurately defines Speed mismatch. The matching definition is: A link problem where connected interfaces are configured for incompatible Ethernet speeds.

Incorrect Answers

Answer A is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “Duplex mismatch” option describes a different concept: a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

 

Question 13

For CRC error, which statement is accurate?

1. A generic interface counter indicating that frames could not be transmitted successfully by an interface.
2. An error indicating that a received Ethernet frame failed its frame check sequence validation.
3. A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.
4. An Ethernet frame that is smaller than the minimum valid frame size.

Correct Answer: B

 

Correct Answer

Answer B is correct because the choice accurately describes CRC error: An error indicating that a received Ethernet frame failed its frame check sequence validation.

Incorrect Answers

Answer A is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer C is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 14

For Collision, which statement is accurate?

1. An Ethernet frame that is smaller than the minimum valid frame size.
2. An error indicating that a received Ethernet frame failed its frame check sequence validation.
3. An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.
4. A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Incorrect Answers

Answer A is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

Answer B is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer D is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

 

Question 15

For Late collision, which statement is accurate?

1. An Ethernet frame that is larger than the supported maximum frame size for the interface configuration.
2. A link problem where the two ends use different duplex settings, often causing collisions and poor performance.
3. A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.
4. A collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer B is incorrect because the “Duplex mismatch” option describes a different concept: a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Answer C is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

 

Question 16

For Input error, which statement is accurate?

1. A collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.
2. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.
3. A generic interface counter indicating that frames could not be transmitted successfully by an interface.
4. An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Correct Answer: B

 

Correct Answer

Answer B is correct because it accurately defines Input error. The matching definition is: A generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Incorrect Answers

Answer A is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

 

Question 17

For Output error, which statement is accurate?

1. A generic interface counter indicating that frames could not be transmitted successfully by an interface.
2. An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.
3. An error indicating that a received Ethernet frame failed its frame check sequence validation.
4. An Ethernet frame that is smaller than the minimum valid frame size.

Correct Answer: A

 

Correct Answer

Answer A is correct because the choice accurately describes Output error: A generic interface counter indicating that frames could not be transmitted successfully by an interface.

Incorrect Answers

Answer B is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Answer C is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 18

For Runt, which statement is accurate?

1. An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.
2. A link problem where connected interfaces are configured for incompatible Ethernet speeds.
3. An Ethernet frame that is smaller than the minimum valid frame size.
4. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes an Ethernet frame that is smaller than the minimum valid frame size.

Incorrect Answers

Answer A is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Answer B is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

Answer D is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

 

Question 19

For Giant, which statement is accurate?

1. An error indicating that a received Ethernet frame failed its frame check sequence validation.
2. An Ethernet frame that is larger than the supported maximum frame size for the interface configuration.
3. A generic interface counter indicating that frames could not be transmitted successfully by an interface.
4. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Incorrect Answers

Answer A is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

 

Question 20

For Err-disabled state, which statement is accurate?

1. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.
2. An Ethernet frame that is larger than the supported maximum frame size for the interface configuration.
3. A collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.
4. A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Correct Answer: D

 

Correct Answer

Answer D is correct because it accurately defines Err-disabled state. The matching definition is: A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Incorrect Answers

Answer A is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Answer B is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer C is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

 

Question 21

During a network fundamentals assessment, the design calls for the following capability: A link problem where the two ends use different duplex settings, often causing collisions and poor performance. Which option names that capability most accurately?

1. Late collision
2. Output error
3. Duplex mismatch
4. CRC error

Correct Answer: C

 

Correct Answer

Answer C is correct because the operational requirement in the stem maps to Duplex mismatch: A link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Incorrect Answers

Answer A is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer B is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

 

Question 22

A copper link fails to establish after one end is fixed at 100 Mb/s and the other at an incompatible rate. Which configuration problem should the engineer investigate first?

1. Speed mismatch
2. Late collision
3. Giant
4. Collision

Correct Answer: A

 

Correct Answer

Answer A is correct because Speed mismatch is the most precise fit for the stated requirement. A link problem where connected interfaces are configured for incompatible Ethernet speeds.

Incorrect Answers

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer D is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

 

Question 23

While working on a basic LAN troubleshooting session, an administrator encounters this requirement: An error indicating that a received Ethernet frame failed its frame check sequence validation. Which answer is the most precise match?

1. CRC error
2. Late collision
3. Runt
4. Collision

Correct Answer: A

 

Correct Answer

Answer A is correct because the scenario is describing the role of CRC error. An error indicating that a received Ethernet frame failed its frame check sequence validation.

Incorrect Answers

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer C is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

Answer D is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

 

Question 24

In a new branch deployment, the team must identify the technology that provides the following function: An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time. Which option should be selected?

1. Giant
2. Collision
3. Output error
4. Speed mismatch

Correct Answer: B

 

Correct Answer

Answer B is correct because Collision directly provides the function required by the scenario. An event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer D is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

 

Question 25

An Ethernet interface reports collisions beyond the normal collision window. The engineer is checking duplex settings and cable length. Which counter condition prompted this investigation?

1. Late collision
2. Err-disabled state
3. Input error
4. Runt

Correct Answer: A

 

Correct Answer

Answer A is correct because the operational requirement in the stem maps to Late collision: A collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Incorrect Answers

Answer B is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Answer C is incorrect because the “Input error” option describes a different concept: a generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Answer D is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

 

Question 26

During a network fundamentals assessment, the design calls for the following capability: A generic interface counter indicating that frames received by an interface encountered a receive-side problem. Which option names that capability most accurately?

1. CRC error
2. Duplex mismatch
3. Collision
4. Input error

Correct Answer: D

 

Correct Answer

Answer D is correct because Input error is the most precise fit for the stated requirement. A generic interface counter indicating that frames received by an interface encountered a receive-side problem.

Incorrect Answers

Answer A is incorrect because the “CRC error” option describes a different concept: an error indicating that a received Ethernet frame failed its frame check sequence validation.

Answer B is incorrect because the “Duplex mismatch” option describes a different concept: a link problem where the two ends use different duplex settings, often causing collisions and poor performance.

Answer C is incorrect because the “Collision” option describes a different concept: an event associated with shared or half-duplex Ethernet in which multiple stations transmit at the same time.

 

Question 27

A router can receive frames, but its interface statistics show failures when sending them. Which category of interface counter records these transmission failures?

1. Giant
2. Late collision
3. Output error
4. Speed mismatch

Correct Answer: C

 

Correct Answer

Answer C is correct because the scenario is describing the role of Output error. A generic interface counter indicating that frames could not be transmitted successfully by an interface.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer D is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

 

Question 28

While working on a basic LAN troubleshooting session, an administrator encounters this requirement: An Ethernet frame that is smaller than the minimum valid frame size. Which answer is the most precise match?

1. Giant
2. Late collision
3. Runt
4. Speed mismatch

Correct Answer: C

 

Correct Answer

Answer C is correct because Runt directly provides the function required by the scenario. An Ethernet frame that is smaller than the minimum valid frame size.

Incorrect Answers

Answer A is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer B is incorrect because the “Late collision” option describes a different concept: a collision detected after the normal Ethernet collision window, often suggesting cabling or duplex problems.

Answer D is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

 

Question 29

In a new branch deployment, the team must identify the technology that provides the following function: An Ethernet frame that is larger than the supported maximum frame size for the interface configuration. Which option should be selected?

1. Output error
2. Giant
3. Speed mismatch
4. Err-disabled state

Correct Answer: B

 

Correct Answer

Answer B is correct because the operational requirement in the stem maps to Giant: An Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Incorrect Answers

Answer A is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.

Answer C is incorrect because the “Speed mismatch” option describes a different concept: a link problem where connected interfaces are configured for incompatible Ethernet speeds.

Answer D is incorrect because the “Err-disabled state” option describes a different concept: a protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

 

Question 30

After a protection feature detects a serious port violation, an IOS switch stops forwarding on that port until the condition is corrected and the port is recovered. Which port state describes this behavior?

1. Runt
2. Giant
3. Output error
4. Err-disabled state

Correct Answer: D

 

Correct Answer

Answer D is correct because Err-disabled state is the most precise fit for the stated requirement. A protective switch-port state in which IOS disables an interface after detecting certain serious conditions.

Incorrect Answers

Answer A is incorrect because the “Runt” option describes a different concept: an Ethernet frame that is smaller than the minimum valid frame size.

Answer B is incorrect because the “Giant” option describes a different concept: an Ethernet frame that is larger than the supported maximum frame size for the interface configuration.

Answer C is incorrect because the “Output error” option describes a different concept: a generic interface counter indicating that frames could not be transmitted successfully by an interface.