Which multicast address does the DR use to flood LSUs to other OSPF routers in a multiaccess network?

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Which multicast address does the DR use to flood LSUs to other OSPF routers in a multiaccess network?

  • 224.0.0.6
  • 224.0.0.4
  • 224.0.0.5
  • 220.0.0.7

Explanation: In OSPF, while non-DR routers send updates to the Designated Router (DR) and Backup Designated Router (BDR) using the multicast address 224.0.0.6, the DR is responsible for flooding those updates (LSUs) to all other OSPF routers on the segment using the multicast address 224.0.0.5.

Related exam: Checkpoint Exam: Layer 3 Technologies – OSPF