In PIM Auto-RP, what is the role of the mapping agent?

To collect RP announcements and distribute the RP-to-group mapping to all routers.

To act as the root of the shared tree for all groups.

To elect the designated router on each multi-access segment.

To forward multicast traffic between different PIM domains.

In PIM Dense Mode, what triggers a router to send a Prune message upstream?

It detects a duplicate forwarding path.

It has no downstream receivers for the group.

It wants to elect a new designated router.

It wants to join the shared tree.

What is the primary benefit of the SPT switchover in PIM Sparse Mode?

It reduces the load on the RP by allowing traffic to flow directly from the source to the receivers.

It reduces the number of PIM hello messages.

It eliminates the need for the RP entirely.

It allows the use of dense mode for the group.

What happens if a PIM dense mode router does not receive a State Refresh message before the prune timer expires?

It removes the prune state and begins flooding traffic again.

It immediately sends a Graft message upstream.

It elects a new designated router.

It sends a new Prune message upstream.

What triggers the switchover from the shared tree to the shortest path tree (SPT) in PIM Sparse Mode?

The designated router on the LAN sends a graft message to the RP.

The first-hop router receives a prune message from the RP.

The RP sends a register-stop message to the first-hop router.

The last-hop router receives the first multicast packet from the source via the RP.

Juniper NetworksCertified Professional, Service Provider Routing and Switching (JNCIP-SP)

Domain 5Objective 5

PIM Modes JN0-664 Practice Questions (Page 2)

Part of the IP Multicast domain, which makes up ~18% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–11 in this domain), expect 1–1 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

12concepts

Questions 6–10

6foundation · easy
In PIM Auto-RP, what is the role of the mapping agent?
Select an answer first
7foundation · easy
In PIM Dense Mode, what triggers a router to send a Prune message upstream?
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8foundation · easy
What is the primary benefit of the SPT switchover in PIM Sparse Mode?
Select an answer first
9foundation · easy
What happens if a PIM dense mode router does not receive a State Refresh message before the prune timer expires?
Select an answer first
10foundation · easy
What triggers the switchover from the shared tree to the shortest path tree (SPT) in PIM Sparse Mode?
Select an answer first

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