JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2024) — Question 12

Which statement about configuring persistent MAC learning is correct?

Answer options

• A. Persistent MAC learning requires 802.1X authentication.
• B. Persistent MAC learning can be configured on access mode interfaces.
• C. Persistent MAC learning flushes dynamically learned MAC addresses on reboots.
• D. Persistent MAC learning cannot be configured on redundant trunk groups.

Correct answer: B

Explanation

The correct answer, B, is true because persistent MAC learning is indeed applicable on access mode interfaces. Option A is incorrect as 802.1X is not a requirement for persistent MAC learning. Option C is wrong because persistent MAC learning retains learned MAC addresses across reboots, and option D is incorrect as it can be configured on redundant trunk groups.