In PIM sparse-mode, how do receivers initially join a multicast group?

They send explicit Join messages toward the rendezvous point (RP)

They flood the network with Join messages to all routers

They wait for the source to send a Join message to them

They rely on IGMP to forward the Join to the source directly

What is the purpose of a host sending an IGMP Leave Group message?

To confirm that it still wants to receive traffic for a group

To indicate it no longer wants to receive traffic for a multicast group

To request a list of all active multicast groups on the LAN

To inform the router of a new multicast source

What is the shared tree in PIM sparse-mode?

A multicast distribution tree rooted at the rendezvous point (RP) that is shared by all sources for a group

A tree that is used only for IGMP snooping on Layer 2 switches

A tree that is built by flooding the network with multicast data

A tree that is built separately for each source and receiver pair

When a router receives IGMP messages from hosts running different IGMP versions, how does it typically handle them?

It processes each message according to the version indicated in the message header

It ignores messages from hosts running older versions

It only processes messages from the version configured on the router interface

It forces all hosts to upgrade to the highest version

Juniper NetworksCertified Professional, Enterprise Routing and Switching (JNCIP-ENT)

Domain 3Objective 2

Multicast Protocols and Mechanisms JN0-650 Practice Questions (Page 3)

Part of the IP Multicast domain, which makes up ~8% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~3–5 in this domain), expect 1–2 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

9concepts

Questions 11–15

11foundation · easy
In PIM sparse-mode, how do receivers initially join a multicast group?
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12foundation · easy
What is the purpose of a host sending an IGMP Leave Group message?
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13foundation · easy
What is the shared tree in PIM sparse-mode?
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14foundation · easy
When a router receives IGMP messages from hosts running different IGMP versions, how does it typically handle them?
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15foundation · easy
Which IGMP message does a host send to indicate that it wants to join a multicast group on a LAN?
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