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200-301 · Question #1438
200-301 Question #1438: Real Exam Question with Answer & Explanation
The correct answer is D: SW4. The switch with the lowest Bridge ID becomes the root bridge in a Spanning Tree Protocol (STP) topology.
Submitted by jordan8· Mar 30, 2026Network Access
Question
Refer to the exhibit. Which switch becomes the root bridge?
Options
- ASW3
- BSW2
- CSW1
- DSW4
Explanation
The switch with the lowest Bridge ID becomes the root bridge in a Spanning Tree Protocol (STP) topology.
Common mistakes.
- A. SW3 would only become the root bridge if its Bridge ID were lower than all other switches, which is not the case if SW4 is the correct answer.
- B. SW2 would only become the root bridge if its Bridge ID were lower than all other switches, which is not the case if SW4 is the correct answer.
- C. SW1 would only become the root bridge if its Bridge ID were lower than all other switches, which is not the case if SW4 is the correct answer.
Concept tested. STP root bridge election
Reference. https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10556-16.html#topic1
Topics
#STP root bridge election#Spanning Tree Protocol#Cisco Switching
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