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Alcatel-Lucent Discussions

Exam 4A0-103 topic 3 question 39 discussion

Actual exam question from Alcatel-Lucent's 4A0-103
Question #: 39
Topic #: 3
[All 4A0-103 Questions]

Which of the following about an established LDP session is TRUE?

  • A. It uses a UDP connection with an arbitrary port number.
  • B. It uses a UDP connection with well-known port number 646.
  • C. It uses a TCP connection with an arbitrary port number.
  • D. It uses a TCP connection with well-known port number 646.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by snowblack at Dec. 10, 2020, 9:50 a.m.

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mynssen3
7 months, 1 week ago
Selected Answer: D
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.
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multidoza
2 years, 11 months ago
D is correct. No chance.
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Aessedai
3 years, 1 month ago
I think D is correct - see output of A:R4# show router ldp session 10.10.10.6 detail ======================================= on Page 441
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snowblack
3 years, 4 months ago
B. It uses a UDP connection with well-known port number 646. -> Answer. Ref: Page 535 Self-study NSR II
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