HPE Aruba Certified Switching Professional (ACSP) — Question 60

A network administrator configures MSTP on an ArubaOS switch. The administrator wants to ensure that this switch is always the root for instance 1.
What should the administrator do to accomplish this?

Answer options

• A. Specify priority 15 for spanning tree instance 1.
• B. Specify spanning tree cost 0 on all switch ports that connect to other switches that use instance 1.
• C. Specify priority 0 for spanning tree instance 1.
• D. Specify spanning tree cost 15 on all switch ports that connect to other switches that use instance 1.

Correct answer: C

Explanation

To ensure that the switch is always the root for instance 1, the administrator should set the priority to 0, as lower priority values are preferred in the spanning tree protocol. Options A, B, and D do not achieve this goal because they either set a higher priority or focus on port costs, which do not influence the root bridge election as directly as priority does.