JNCIP-ENT IP Multicast Practice Question
An enterprise network uses multiple routing instances with PIM sparse-mode. An engineer needs to configure Inter-AS multicast routing using MSDP. Which component is required to establish MSDP peering across different autonomous systems where BGP is also running?
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
✓
Matching MSDP peer loopback addresses and TCP session establishment with MBGP routing
MSDP peers can be configured between BGP speakers in different ASs. The MSDP peer address often matches the BGP router ID or loopback, and MBGP supplies the RPF route for the source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A shared PIM dense-mode tunnel between the AS border routers
Why it's wrong here
PIM dense-mode is not used between autonomous systems for MSDP.
- ✗
IGMPv2 proxy configuration on the border routers
Why it's wrong here
IGMP proxy is used for stub routing, not inter-AS MSDP peering.
- ✗
Static multicast routes for all 224.0.0.0/4 destinations
Why it's wrong here
Static multicast routes do not scale for Inter-AS multicast; MBGP and MSDP are used.
- ✓
Matching MSDP peer loopback addresses and TCP session establishment with MBGP routing
Why this is correct
Inter-AS MSDP requires valid TCP peering between RPs and MBGP routing to ensure RPF validation across AS boundaries.
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.