Designing Cisco Enterprise Networks (ENSLD) — Question 80

An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end-users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning-tree topology is not affected by these rogue switches?

Answer options

Correct answer: D

Explanation

The correct answer is D, root guard, as it prevents designated ports from becoming root ports if a rogue switch sends superior Bridge Protocol Data Units (BPDUs). Options A, B, and C do not specifically address the issue of unauthorized switches impacting the root bridge election, thus failing to provide the necessary protection for the spanning-tree topology.