Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 43

Assuming all STP enabled switches have the same bridge priority. The MAC address of switch A is 00-e0-fc-00-00-40, the MAC address of switch B is 00-e0-fc-
00-00-10, the MAC address of switch C is 00-e0-fc-00-00-20, and the MAC address of switch D is 00-e0-fc-00-00-80.
Which switch will be elected as the root switch?

Answer options

• A. Switch A
• B. Switch B
• C. Switch C
• D. Switch D

Correct answer: B

Explanation

The root switch in an STP environment is determined by the lowest MAC address when bridge priorities are equal. Switch B has the lowest MAC address (00-e0-fc-00-00-10) compared to the other switches, making it the root switch. The other switches have higher MAC addresses, so they cannot be the root switch.