LDP hellos use which UDP port and multicast address? (Choose two.)

ITExamAnswers Editorial Team Last Updated: Jun 29, 2026

IT Exam Items Repository › Category: CCNP ENARSI v9 › LDP hellos use which UDP port and multicast address? (Choose two.)

LDP hellos use which UDP port and multicast address? (Choose two.)

224.0.0.5
464
500
224.0.0.2
646
224.0.0.6

Explanation: LDP uses two steps to establish sessions. First, it sends Hello messages as UDP packets to the "all routers on this subnet" multicast address 224.0.0.2,. Both the UDP discovery phase and the subsequent TCP session establishment use the well-known LDP port number 646.

About The Author

ITExamAnswers Editorial Team

The ITExamAnswers Editorial Team is a dedicated group of certified IT professionals and network engineers. We rigorously review, verify, and update all exam materials to ensure you receive the most accurate and reliable resources for your certification journey.