JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 68

A host is connected to your EX Series switch using an interface with persistent MAC learning enabled. When you connect the host to another interface on the same switch, all traffic generated by the host is dropped.

Which action should you perform to solve the problem?

Answer options

• A. Configure the interface as a trunk port.
• B. Enter the clear dhcp snooping database command.
• C. Enter the clear ethernet switching table persistent learning command.
• D. Disable dynamic ARP inspection.

Correct answer: C

Explanation

The correct answer is C because entering the 'clear ethernet switching table persistent learning' command will remove the persistent MAC address from the switch, allowing the host to communicate through the new interface. Options A, B, and D do not address the issue of MAC address persistence affecting traffic flow on the switch.