JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 11

Which statement is true of a Layer 2 circuit?

Answer options

• A. Layer 2 circuits use BGP for signaling
• B. Layer 2 circuits use OSPF for signaling
• C. Layer 2 circuits use LDP for signaling
• D. Layer 2 circuits rely on RSVP for signaling

Correct answer: C

Explanation

The correct answer is C because Layer 2 circuits typically use LDP (Label Distribution Protocol) for signaling to establish label-switched paths. Options A and B are incorrect as BGP and OSPF are primarily used for Layer 3 routing protocols, while option D is also incorrect since RSVP is used for resource reservation in networking rather than for Layer 2 circuit signaling.