How does Protocol Independent Multicast function?

IT Questions BankCategory: CCNPHow does Protocol Independent Multicast function?
How does Protocol Independent Multicast function? 1ITExamAnswers Staff asked 5 months ago

How does Protocol Independent Multicast function?

  • A. In sparse mode it establishes neighbor adjacencies and sends hello messages at 5-second intervals.
  • B. It uses the multicast routing table to perform the multicast forwarding function.
  • C. It uses unicast routing information to perform the multicast forwarding function.
  • D. It uses broadcast routing information to perform the multicast forwarding function.

Explanation: Although PIM is called a multicast routing protocol, it actually uses the unicast routing table to perform the reverse path forwarding (RPF) check function instead of building up a completely independent multicast routing table. Unlike other routing protocols, PIM does not send and receive routing updates between routers.

Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-tech-oview.html
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