JNCIP-ENT IP Multicast Practice Question
An enterprise design requires configuring an Anycast RP setup using two Junos routers to provide redundancy for PIM sparse-mode. Which mechanism is required to synchronize source state information between the two Anycast RPs within the same AS?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Multicast Source Discovery Protocol (MSDP)
When deploying Anycast RP within a single PIM domain using MSDP, MSDP peer connections are established between the Anycast RP addresses to exchange SA (Source Active) messages, ensuring both RPs know about sources registered to either RP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Multicast Source Discovery Protocol (MSDP)
Why this is correct
MSDP is used between Anycast RPs to exchange source-active information so that receivers joined to one RP learn about sources registered to the other RP.
- ✗
Protocol Independent Multicast Dense-Mode (PIM-DM)
Why it's wrong here
PIM dense-mode is not used to synchronize state between Anycast RPs.
- ✗
IGMPv3 snooping
Why it's wrong here
IGMP snooping operates at layer 2 for switch ports, not between Layer 3 RPs.
- ✗
Multicast BGP (MBGP)
Why it's wrong here
MBGP provides multicast RPF routing information, not source active state synchronization between Anycast RPs.
About these practice questions
One of 336 original JNCIP-ENT practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIP-ENT practice question is part of Courseiva's free Juniper Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the JNCIP-ENT exam.