Which of the following about an established LDP session is TRUE?
Which of the following about an established LDP session is TRUE?
An established LDP (Label Distribution Protocol) session uses a TCP connection with the well-known port number 646. This is required for the reliable exchange of LDP messages between peers.
B. It uses a UDP connection with well-known port number 646. -> Answer. Ref: Page 535 Self-study NSR II
I think D is correct - see output of A:R4# show router ldp session 10.10.10.6 detail ======================================= on Page 441
D is correct. No chance.
LDP will use port 646 in both TCP and UDP. Although it will use 646 UDP only for the discovery process , and 646 TCP for all other actions. The question is about a full established session, so, protocol UDP was not necessecery anymore.