Exam N10-009 topic 1 question 326 discussion

Actual exam question from CompTIA's N10-009

Question #: 326
Topic #: 1

While conducting a network audit, an administrator notices the spanning tree root in VLAN 300 does not match the configuration baseline, which could cause network outages due to spanning tree update failures. Which of the following should the administrator do to restore consistency?

A. Change the designated port on the misconfigured switch to a root port.
B. Change the root port to a listening port on the misconfigured switch.
C. Change the blocked port of the misconfigured switch to a learning port.
D. Increase the bridge ID/priority on the misconfigured switch.

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Suggested Answer: D 🗳️

by Jstark111 at May 11, 2025, 10:28 p.m.

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Jstark111

1 month, 2 weeks ago

Selected Answer: D

In Spanning Tree Protocol (STP), the switch with the lowest bridge ID (priority + MAC address) becomes the root bridge. If the current root bridge for VLAN 300 does not match the intended design, the administrator should increase the priority (i.e., increase the bridge ID) on the misconfigured switch to prevent it from becoming the root, thereby allowing the correct switch to resume its role.

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