Cisco CCNA 200-301 Ethernet Switching Concepts Practice Test

Topic 11 focuses on Ethernet Switching Concepts 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

Which switch table maps learned Layer 2 MAC addresses to switch ports and VLANs?

1. MAC address table
2. Frame filtering
3. Frame forwarding
4. Broadcast flooding

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Incorrect Answers

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer C is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer D is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

 

Question 2

What is the switch process of recording the source MAC address of an incoming frame against the ingress port?

1. Source MAC learning
2. Unknown unicast flooding
3. Known unicast forwarding
4. Frame forwarding

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the switch process of recording the source MAC address of an incoming frame against the ingress port.

Incorrect Answers

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer C is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

Answer D is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

 

Question 3

Which term describes sending a frame only through the port associated with the destination MAC address in the switch table?

1. Collision domain
2. MAC aging
3. Broadcast flooding
4. Known unicast forwarding

Correct Answer: D

 

Correct Answer

Answer D is correct because it describes sending a frame only through the port associated with the destination MAC address in the switch table.

Incorrect Answers

Answer A is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Answer B is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Answer C is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

 

Question 4

Which term describes sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table?

1. Broadcast flooding
2. Frame filtering
3. Unknown unicast flooding
4. Source MAC learning

Correct Answer: C

 

Correct Answer

Answer C is correct because Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Incorrect Answers

Answer A is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer D is incorrect because the “Source MAC learning” option describes a different concept: the switch process of recording the source MAC address of an incoming frame against the ingress port.

 

Question 5

Which term describes sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port?

1. Broadcast flooding
2. Collision domain
3. Known unicast forwarding
4. Broadcast domain

Correct Answer: A

 

Correct Answer

Answer A is correct because it describes sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Incorrect Answers

Answer B is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Answer C is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

Answer D is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

 

Question 6

What is the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period?

1. Collision domain
2. MAC aging
3. Unknown unicast flooding
4. Known unicast forwarding

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Incorrect Answers

Answer A is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Answer C is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 7

What is an Ethernet segment on which transmissions can contend or collide called?

1. Frame forwarding
2. Frame filtering
3. MAC aging
4. Collision domain

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer C is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

 

Question 8

What is the group of devices reached by a Layer 2 broadcast within a VLAN called?

1. Frame forwarding
2. Frame filtering
3. Broadcast domain
4. MAC address table

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer D is incorrect because the “MAC address table” option describes a different concept: a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

 

Question 9

What is the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame?

1. Broadcast flooding
2. Unknown unicast flooding
3. Frame forwarding
4. Frame filtering

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Incorrect Answers

Answer A is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer D is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

 

Question 10

What is the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment?

1. Frame forwarding
2. Broadcast flooding
3. Unknown unicast flooding
4. Frame filtering

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer B is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer C is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

 

Question 11

For MAC address table, which statement is accurate?

1. The switch process of recording the source MAC address of an incoming frame against the ingress port.
2. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.
3. A switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.
4. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Incorrect Answers

Answer A is incorrect because the “Source MAC learning” option describes a different concept: the switch process of recording the source MAC address of an incoming frame against the ingress port.

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer D is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

 

Question 12

For Source MAC learning, which statement is accurate?

1. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
2. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.
3. The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.
4. The switch process of recording the source MAC address of an incoming frame against the ingress port.

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes the switch process of recording the source MAC address of an incoming frame against the ingress port.

Incorrect Answers

Answer A is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer C is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

 

Question 13

For Known unicast forwarding, which statement is accurate?

1. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
2. Sending a frame only through the port associated with the destination MAC address in the switch table.
3. The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.
4. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Correct Answer: B

 

Correct Answer

Answer B is correct because it accurately defines Known unicast forwarding. The matching definition is: Sending a frame only through the port associated with the destination MAC address in the switch table.

Incorrect Answers

Answer A is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer C is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Answer D is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

 

Question 14

For Unknown unicast flooding, which statement is accurate?

1. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
2. A switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.
3. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.
4. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Correct Answer: D

 

Correct Answer

Answer D is correct because the choice accurately describes Unknown unicast flooding: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Incorrect Answers

Answer A is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer B is incorrect because the “MAC address table” option describes a different concept: a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Answer C is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

 

Question 15

For Broadcast flooding, which statement is accurate?

1. Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.
2. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
3. A network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.
4. The group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Correct Answer: A

 

Correct Answer

Answer A is correct because it describes sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Incorrect Answers

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer C is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Answer D is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

 

Question 16

For MAC aging, which statement is accurate?

1. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.
2. The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.
3. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.
4. Sending a frame only through the port associated with the destination MAC address in the switch table.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Incorrect Answers

Answer A is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer C is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 17

For Collision domain, which statement is accurate?

1. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.
2. A network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.
3. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
4. Sending a frame only through the port associated with the destination MAC address in the switch table.

Correct Answer: B

 

Correct Answer

Answer B is correct because it accurately defines Collision domain. The matching definition is: A network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer C is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 18

For Broadcast domain, which statement is accurate?

1. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.
2. Sending a frame only through the port associated with the destination MAC address in the switch table.
3. The group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.
4. A network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Correct Answer: C

 

Correct Answer

Answer C is correct because the choice accurately describes Broadcast domain: The group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer B is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

Answer D is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

 

Question 19

For Frame forwarding, which statement is accurate?

1. Sending a frame only through the port associated with the destination MAC address in the switch table.
2. The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.
3. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.
4. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Incorrect Answers

Answer A is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

Answer B is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Answer D is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

 

Question 20

For Frame filtering, which statement is accurate?

1. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.
2. The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.
3. The group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.
4. A switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Incorrect Answers

Answer A is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer C is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Answer D is incorrect because the “MAC address table” option describes a different concept: a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

 

Question 21

While working on a basic LAN troubleshooting session, an administrator encounters this requirement: A switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs. Which answer is the most precise match?

1. MAC address table
2. Unknown unicast flooding
3. Broadcast domain
4. Broadcast flooding

Correct Answer: A

 

Correct Answer

Answer A is correct because MAC address table directly provides the function required by the scenario. A switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Incorrect Answers

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer C is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Answer D is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

 

Question 22

In a new branch deployment, the team must identify the technology that provides the following function: The switch process of recording the source MAC address of an incoming frame against the ingress port. Which option should be selected?

1. Unknown unicast flooding
2. Frame filtering
3. Known unicast forwarding
4. Source MAC learning

Correct Answer: D

 

Correct Answer

Answer D is correct because the operational requirement in the stem maps to Source MAC learning: The switch process of recording the source MAC address of an incoming frame against the ingress port.

Incorrect Answers

Answer A is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer B is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer C is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 23

A switch already has a valid destination MAC entry for a received unicast frame. It sends the frame only through the associated egress port. Which forwarding behavior is this?

1. MAC aging
2. Unknown unicast flooding
3. Known unicast forwarding
4. Broadcast flooding

Correct Answer: C

 

Correct Answer

Answer C is correct because Known unicast forwarding is the most precise fit for the stated requirement. Sending a frame only through the port associated with the destination MAC address in the switch table.

Incorrect Answers

Answer A is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Answer B is incorrect because the “Unknown unicast flooding” option describes a different concept: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Answer D is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

 

Question 24

During a network fundamentals assessment, the design calls for the following capability: Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table. Which option names that capability most accurately?

1. Frame forwarding
2. Broadcast flooding
3. MAC aging
4. Unknown unicast flooding

Correct Answer: D

 

Correct Answer

Answer D is correct because the scenario is describing the role of Unknown unicast flooding. Sending a unicast frame out eligible ports in the VLAN when the destination MAC address is not in the switch table.

Incorrect Answers

Answer A is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer B is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer C is incorrect because the “MAC aging” option describes a different concept: the removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

 

Question 25

A host sends an Ethernet frame to FF:FF:FF:FF:FF:FF. The switch copies it to eligible ports in the same VLAN other than the ingress port. Which behavior is occurring?

1. Source MAC learning
2. Broadcast flooding
3. Collision domain
4. Frame filtering

Correct Answer: B

 

Correct Answer

Answer B is correct because Broadcast flooding directly provides the function required by the scenario. Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Incorrect Answers

Answer A is incorrect because the “Source MAC learning” option describes a different concept: the switch process of recording the source MAC address of an incoming frame against the ingress port.

Answer C is incorrect because the “Collision domain” option describes a different concept: a network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Answer D is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

 

Question 26

While working on a basic LAN troubleshooting session, an administrator encounters this requirement: The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period. Which answer is the most precise match?

1. MAC aging
2. Broadcast domain
3. Broadcast flooding
4. Known unicast forwarding

Correct Answer: A

 

Correct Answer

Answer A is correct because the operational requirement in the stem maps to MAC aging: The removal of dynamically learned MAC table entries after they have been inactive for the configured aging period.

Incorrect Answers

Answer B is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Answer C is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 27

Replacing a hub with a switch gives each attached link its own contention boundary. Which type of domain is separated by the switch ports?

1. Collision domain
2. Known unicast forwarding
3. Frame forwarding
4. Frame filtering

Correct Answer: A

 

Correct Answer

Answer A is correct because Collision domain is the most precise fit for the stated requirement. A network segment in which Ethernet transmissions could contend or collide; each modern switched port is its own collision domain.

Incorrect Answers

Answer B is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

Answer C is incorrect because the “Frame forwarding” option describes a different concept: the process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Answer D is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

 

Question 28

Two groups of switch ports are placed in separate VLANs so that a Layer 2 broadcast from one group does not reach the other. What has been separated?

1. Broadcast flooding
2. Broadcast domain
3. Source MAC learning
4. Frame filtering

Correct Answer: B

 

Correct Answer

Answer B is correct because the scenario is describing the role of Broadcast domain. The group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Incorrect Answers

Answer A is incorrect because the “Broadcast flooding” option describes a different concept: Sending a Layer 2 broadcast frame out all eligible ports in the same VLAN except the ingress port.

Answer C is incorrect because the “Source MAC learning” option describes a different concept: the switch process of recording the source MAC address of an incoming frame against the ingress port.

Answer D is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

 

Question 29

During a network fundamentals assessment, the design calls for the following capability: The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame. Which option names that capability most accurately?

1. Frame forwarding
2. MAC address table
3. Frame filtering
4. Known unicast forwarding

Correct Answer: A

 

Correct Answer

Answer A is correct because Frame forwarding directly provides the function required by the scenario. The process by which a switch uses the destination MAC address and its table to decide where to send an Ethernet frame.

Incorrect Answers

Answer B is incorrect because the “MAC address table” option describes a different concept: a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Answer C is incorrect because the “Frame filtering” option describes a different concept: the switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.

 

Question 30

A switch learns that a frame’s destination is reachable on the same segment from which the frame arrived. It does not send the frame back onto that segment. Which switching action does this illustrate?

1. Broadcast domain
2. Frame filtering
3. MAC address table
4. Known unicast forwarding

Correct Answer: B

 

Correct Answer

Answer B is correct because the operational requirement in the stem maps to Frame filtering: The switch action of not forwarding a frame to a port when the destination is known to be reachable through another port or the same ingress segment.

Incorrect Answers

Answer A is incorrect because the “Broadcast domain” option describes a different concept: the group of devices that receive a Layer 2 broadcast; VLANs normally create separate broadcast domains.

Answer C is incorrect because the “MAC address table” option describes a different concept: a switch table that maps learned Layer 2 MAC addresses to switch ports and VLANs.

Answer D is incorrect because the “Known unicast forwarding” option describes a different concept: Sending a frame only through the port associated with the destination MAC address in the switch table.