Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 217

What TCP port is used by LDP to provide for reliable transport connections?

Answer options

• A. 646
• B. 648
• C. 752
• D. 712

Correct answer: A

Explanation

The correct answer is A, as LDP (Label Distribution Protocol) specifically uses TCP port 646 for its operations to ensure reliable transport. The other options, B (648), C (752), and D (712), do not correspond to the port designated for LDP and are therefore incorrect.