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IP Multicast practice questions

Practise Juniper Networks Enterprise Routing and Switching, Professional (JNCIP-ENT, JN0-650) (JNCIP-ENT) IP Multicast practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: IP Multicast
Practice 10 questionsBrowse domain →

What the exam tests

What to know about IP Multicast

IP Multicast questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common IP Multicast exam traps

  • ▸Answering from memory before reading the full scenario.
  • ▸Missing a constraint such as cost, availability, security, scope or command context.
  • ▸Choosing a broad answer when the question asks for the most specific fix.
  • ▸Ignoring why the wrong options are tempting.

Practice set

IP Multicast questions

20 questions · select your answer, then reveal the explanation

Question 1hardmultiple choice
Study the full multicast explanation →

In an enterprise network running PIM sparse-mode, an engineer notices that multicast traffic is switched from the shared tree (*,G) to the source-specific tree (S,G) prematurely, causing micro-bursts on core links. Which command disables this automatic switchover behavior on a Junos router?

Question 2hardmultiple choice
Study the full multicast explanation →

An enterprise network uses PIM sparse-mode across multiple routing instances. An administrator notices that source registration messages are looping between the designated router (DR) and the RP. Which configuration statement under [edit protocols pim] will prevent the DR from continuously encapsulating and sending register messages when no receivers are joined?

Question 3mediummultiple choice
Open the full VLAN trunking answer →

An engineer wants to restrict IGMP membership reports to only accept version 2 on a specific VLAN interface configured on an MX Series router. Which configuration statement achieves this requirement?

Question 4easymultiple choice
Study the full multicast explanation →

A network administrator needs to display the multicast routing table entries, including incoming interfaces and outgoing interface lists (OIL), on a Junos device. Which operational command should be used?

Question 5mediummultiple choice
Study the full multicast explanation →

An administrator wants to configure MSDP (Multicast Source Discovery Protocol) between two autonomous system border routers to share active source information. Which configuration hierarchy in Junos is used to define the MSDP peer relationship?

Question 6hardmultiple choice
Study the full multicast explanation →

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?

Question 7easymultiple choice
Study the full multicast explanation →

Which IPv4 multicast address range is designated for Source-Specific Multicast (SSM) operations according to IANA standards?

Question 8mediummultiple choice
Study the full multicast explanation →

An engineer configures protocol independent multicast (PIM) sparse-mode on a Junos device and notices that join messages are not reaching the Rendezvous Point (RP). Which CLI command should the engineer use to verify the operational state of the PIM neighbor adjacencies and confirm that the hello messages are successfully exchanged?

Question 9mediummultiple choice
Study the full multicast explanation →

An administrator wants to configure a static Rendezvous Point (RP) with IP address 192.168.100.1 for all multicast groups on a Junos router. Which configuration accomplishes this?

Question 10mediummultiple choice
Study the full multicast explanation →

An enterprise administrator wants to limit PIM sparse-mode join messages to prevent unauthorized sources from registering. Where should a policy be applied to filter PIM join/prune messages in Junos?

Question 11easymultiple choice
Study the full multicast explanation →

Which configuration statement enables PIM sparse-mode globally across all interfaces in a Junos routing instance?

Question 12hardmultiple choice
Review the full OSPF breakdown →

A network engineer troubleshoots an issue where multicast data packets are being dropped due to an RPF (Reverse Path Forwarding) check failure. The unicast routing table uses OSPF, but MBGP is deployed for multicast routing. Which operational command should the engineer use to verify the multicast RPF path for a specific source IP?

Question 13mediummultiple choice
Study the full multicast explanation →

An engineer needs to view the MSDP Source-Active (SA) cache on a Junos router to verify which sources are currently active across different PIM domains. Which operational command should be executed?

Question 14hardmultiple choice
Study the full multicast explanation →

An administrator configures MSDP peering between two routers. After configuration, the MSDP session remains in the 'Connect' or 'Active' state and never transitions to 'Established'. Which underlying protocol dependency must be verified and operational for MSDP sessions to establish?

Question 15easymultiple choice
Study the full multicast explanation →

An engineer needs to verify which multicast groups have active receivers joined on an interface using IGMP. Which operational command should be used?

Question 16easymultiple choice
Study the full multicast explanation →

Which operational command is used to verify the operational status and peer state of MSDP sessions on a Junos device?

Question 17mediummultiple choice
Study the full multicast explanation →

An administrator wants to configure Candidate-RP (C-RP) advertisements using the Bootstrap Router (BSR) mechanism in PIM sparse-mode. Which hierarchy level in Junos is used to configure the local router as a Candidate-RP?

Question 18easymultiple choice
Study the full multicast explanation →

Which protocol version introduces explicit source inclusion and exclusion lists (TO_EX, TO_IN, IS_IN, IS_EX) in membership reports?

Question 19hardmultiple choice
Study the full multicast explanation →

During multicast troubleshooting, an engineer notices that a router is not accepting MSDP Source-Active messages from a specific peer. Where should an export policy be applied to control which SA messages are sent or accepted via MSDP?

Question 20mediummultiple choice
Study the full multicast explanation →

An administrator wants to configure an MSDP peer relationship on a Junos device and ensure that the MD5 password authentication is applied to the TCP session. Where is the MD5 authentication key configured for an MSDP peer?

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Focused IP Multicast sessions

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Frequently asked questions

What does the JNCIP-ENT exam test about IP Multicast?
IP Multicast questions test whether you can apply the concept in context, not just recognise a definition.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just IP Multicast questions in a focused session?
Yes — the session launcher on this page draws every question from the IP Multicast domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other JNCIP-ENT topics?
Use the topic links above to move to related areas, or go back to the JNCIP-ENT question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the JNCIP-ENT exam covers. They are not copied from any real exam or dump site.