JNCIP-ENT: Juniper Networks Certified Professional – Enterprise Routing (2023) — Question 23

You are currently using VLAN IDs 2 through 300 within your Layer 2 domain and you need to configure VSTP to prevent loops. You must ensure that all VLANs are loop free.
In this scenario, which statement is correct?

Answer options

• A. You must ensure that the VLANs are balanced between two different root bridges.
• B. You must enable RSTP to account for all VLANs.
• C. You must ensure that the bridge priority is set to the lowest value on all switches in the Layer 2 domain.
• D. You must enable all VLANs, 2 through 300, under the VSTP configuration.

Correct answer: D

Explanation

The correct answer is D because enabling all VLANs under the VSTP configuration ensures that each VLAN is accounted for in the spanning tree protocol, preventing loops. Options A, B, and C do not directly address the requirement of ensuring that all VLANs are loop-free within the VSTP context.