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Question 31 - JN0-351 discussion

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Which two statements correctly describe RSTP port roles? (Choose two.)

A.
The designated port forwards data to the downstream network segment or device.
Answers
A.
The designated port forwards data to the downstream network segment or device.
B.
The backup port is used as a backup for the root port.
Answers
B.
The backup port is used as a backup for the root port.
C.
The alternate port is a standby port for an edge port.
Answers
C.
The alternate port is a standby port for an edge port.
D.
The root port is responsible for forwarding data to the root bridge.
Answers
D.
The root port is responsible for forwarding data to the root bridge.
Suggested answer: A, D

Explanation:

In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree1.

Option A suggests that the designated port forwards data to the downstream network segment or device.This is correct because the designated port is the port on a network segment that has the best path to the root bridge1.It's responsible for forwarding frames towards the root bridge and sending configuration messages into its segment1.

Option D suggests that the root port is responsible for forwarding data to the root bridge.This is also correct because the root port is always the link directly connected to the root bridge, or the shortest path to the root bridge1.It's used to forward traffic towards the root bridge1.

Therefore, options A and D are correct.

asked 18/09/2024
Jeff Fazio
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