JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2021) — Question 22

You are establishing RSVP LSPs through your MPLS-enabled network. You are asked to ensure that the LSPs will support end-to-end class-of-service handling.
Which statement is correct in this scenario?

Answer options

• A. Configure ultimate-hop-popping on the egress device.
• B. Configure implicit-null on all MPLS-enabled devices.
• C. Configure explicit-null on all MPLS-enabled devices.
• D. Configure entropy-label on the egress device.

Correct answer: A

Explanation

The correct answer is A because configuring ultimate-hop-popping on the egress device allows for proper handling of class-of-service at the end of the LSP. Options B and C suggest using null labels, which do not directly support end-to-end class-of-service handling. Option D, while related to load balancing, does not ensure class-of-service support.