A small network with a few routers and a high-bandwidth LAN is implementing multicast for a live video feed. The network has no receivers initially, but the source starts sending. The engineer wants to ensure that the feed is delivered to any receiver that joins later, but also wants to minimize unnecessary traffic when no receivers are present. Which PIM mode is most appropriate?

PIM Source-Specific Multicast (SSM)

A large enterprise network uses PIM-SM for multicast. Receivers are spread across many sites, and the source is located at a remote site. The network team wants to minimize initial join latency and ensure that traffic flows efficiently after the first packet. What is the correct behavior of PIM-SM?

The RP sends periodic broadcasts to all receivers to announce the source.

Receivers send IGMP joins to the RP, and the RP forwards traffic down the shared tree until a receiver triggers a switch to the shortest-path tree.

The source floods traffic to all routers, and routers prune branches without receivers.

Receivers send PIM joins directly to the source, and the source sends traffic directly to each receiver.

A network administrator is configuring PIM-SM in a new multicast domain. The network has multiple potential RPs, and the administrator wants to provide redundancy and automatic failover if the primary RP fails. Which mechanism should be used?

Configure multiple RPs and use Auto-RP or BSR for dynamic RP discovery and failover.

Configure a single static RP on all routers and rely on PIM to elect a new RP.

Enable PIM-DM to avoid the need for an RP.

Use IGMP snooping to select the RP.

In a PIM-SM network, a receiver has been receiving multicast traffic via the shared tree through the RP. The network administrator notices that the path through the RP is suboptimal and wants to improve latency. What triggers the last-hop router to switch to the shortest-path tree?

The RP sends a prune message to the source.

The receiver sends an IGMP report to the source.

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

The source sends an explicit join to the last-hop router.

CCIE Enterprise Infrastructure

Domain 1Objective 6

Multicast CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 4)

Part of the Network Infrastructure domain, which accounts for 30% of the CCIE-ENTERPRISE-INFRASTRUCTURE exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~15–24 in this domain), expect 3–4 from this objective — we provide 40 practice questions to prepare you well beyond it. (estimate)

40questions here

8free pages

12concepts

30%of the exam

Questions 16–20

16application · medium
A small network with a few routers and a high-bandwidth LAN is implementing multicast for a live video feed. The network has no receivers initially, but the source starts sending. The engineer wants to ensure that the feed is delivered to any receiver that joins later, but also wants to minimize unnecessary traffic when no receivers are present. Which PIM mode is most appropriate?
Select an answer first
17application · medium
A large enterprise network uses PIM-SM for multicast. Receivers are spread across many sites, and the source is located at a remote site. The network team wants to minimize initial join latency and ensure that traffic flows efficiently after the first packet. What is the correct behavior of PIM-SM?
Select an answer first
18application · medium
A network administrator is configuring PIM-SM in a new multicast domain. The network has multiple potential RPs, and the administrator wants to provide redundancy and automatic failover if the primary RP fails. Which mechanism should be used?
Select an answer first
19application · medium
A network team is choosing between Auto-RP and BSR for RP distribution in a PIM-SM network. The network uses only Cisco routers and has a mix of older and newer IOS versions. The team wants a solution that is Cisco-proprietary but widely supported. Which mechanism should they choose?
Select an answer first
20application · medium
In a PIM-SM network, a receiver has been receiving multicast traffic via the shared tree through the RP. The network administrator notices that the path through the RP is suboptimal and wants to improve latency. What triggers the last-hop router to switch to the shortest-path tree?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to CCIE-ENTERPRISE-INFRASTRUCTURE

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Cisco. “CCIE-ENTERPRISE-INFRASTRUCTURE” is a trademark of its owner, used for identification only.

Multicast CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 4)

Questions 16–20

A large enterprise network uses PIM-SM for multicast. Receivers are spread across many sites, and the source is located at a remote site. The network team wants to minimize initial join latency and ensure that traffic flows efficiently after the first packet. What is the correct behavior of PIM-SM?

A network administrator is configuring PIM-SM in a new multicast domain. The network has multiple potential RPs, and the administrator wants to provide redundancy and automatic failover if the primary RP fails. Which mechanism should be used?

A network team is choosing between Auto-RP and BSR for RP distribution in a PIM-SM network. The network uses only Cisco routers and has a mix of older and newer IOS versions. The team wants a solution that is Cisco-proprietary but widely supported. Which mechanism should they choose?

In a PIM-SM network, a receiver has been receiving multicast traffic via the shared tree through the RP. The network administrator notices that the path through the RP is suboptimal and wants to improve latency. What triggers the last-hop router to switch to the shortest-path tree?

Keep studying — Network Infrastructure