300-420 Question #144: Real Exam Question with Answer & Explanation

The correct answer is C: bootstrap router. The bootstrap router (BSR) is a standards-based mechanism for dynamically discovering Rendezvous Points (RPs) in Protocol Independent Multicast - Sparse Mode (PIM-SM) networks.

Advanced Addressing and Routing Solutions

Question

Which type of rendezvous point deployment is standards-based and support dynamic RP discovery?

Options

AAuto-RP
BAnycast-RP
Cbootstrap router
Dstatic RP

Explanation

The bootstrap router (BSR) is a standards-based mechanism for dynamically discovering Rendezvous Points (RPs) in Protocol Independent Multicast - Sparse Mode (PIM-SM) networks.

Common mistakes.

A. Auto-RP is a Cisco proprietary protocol for dynamic RP discovery and is not considered a standards-based mechanism.
B. Anycast-RP provides redundancy for a configured RP by allowing multiple RPs to share the same IP address, but it does not facilitate dynamic discovery of the RP itself.
D. Static RP requires manual configuration of the RP address on all PIM routers, which offers no dynamic discovery capabilities.

Concept tested. PIM-SM dynamic RP discovery mechanisms

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/configuration/15-mt/imc-15-mt-book/imc-pim-bsr.html

Topics

#Multicast#PIM-SM#Rendezvous Point#Bootstrap Router (BSR)

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