JNCIE-ENT: Juniper Networks Certified Expert – Enterprise Routing and Switching — Question 5

You are asked to secure the routing engine of all Junos devices in your design. The design should not affect transit traffic.
Which action will accomplish this task?

Answer options

• A. Use a firewall filter on a revenue port.
• B. Use a firewall filter on the loopback interface.
• C. Use a firewall filter on the fxp0 interfaces.
• D. Use a firewall filter on the management interface.

Correct answer: B

Explanation

Using a firewall filter on the loopback interface secures the routing engine effectively while not interfering with transit traffic. The other options, such as the revenue port, fxp0 interfaces, and management interface, could potentially affect transit traffic or not provide the necessary isolation for the routing engine.