JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 47

Which two statements about BPDU protection are correct? (Choose two.)

Answer options

• A. By default, you must manually clear a BPDU error condition when using BPDU protection.
• B. BPDU protection prevents unauthorized switches from connecting to and participating in your spanning tree topology.
• C. By default, BPDU protection prevents the root bridge from communicating with other STP members unless it receives a superior BPDU first.
• D. BPDU protection requires that STP or RSTP is configured on the switch.

Correct answer: A, B

Explanation

Option A is correct because BPDU protection does require manual intervention to resolve error conditions. Option B is also correct as BPDU protection is designed to prevent unauthorized switches from participating in the spanning tree. Options C and D are incorrect; C misrepresents the communication rules of the root bridge, and D is not accurate because BPDU protection can function even without STP or RSTP configured.