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On the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is 10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that R1 and R2 are DRs on the network. Options:
Correct Answer: B
Comprehensive and Detailed In-Depth Explanation: 1. Understanding OSPFv3 and DR/BDR Election * In OSPFv3, on broadcast and non-broadcast networks, routers elect a Designated Router (DR) and a Backup Designated Router (BDR) to reduce LSA flooding. * The DR is responsible for generating Network LSAs (Type 2 LSAs) for the subnet. * The BDR takes over if the DR fails. * Other routers (DROther) only form adjacencies with the DR and BDR but still receive LSAs. 2. Understanding the LSA Output in the Figure * The LSA shown in the figure is a Type 1 (Router LSA). * The originating router is R2 (Router ID: 10.0.2.2). * The LSA lists two "Transit Network" links connected to R2. * The Neighbor Router IDs listed are 10.0.1.1 (R1) and 10.0.2.2 (R2). 3. Why the Statement is FALSE * A transit network (broadcast network) should have only ONE DR. * R1 and R2 both being DRs is incorrect, as only one DR per subnet should exist. * The presence of two "Transit Network" entries in the LSA suggests that there are two separate OSPF broadcast networks, each with its own DR. * This means R1 and R2 are each DRs on separate networks, but not both DRs on the same network. Final Answer: HCIP-Datacom-Advanced Routing & Switching Technology References: * OSPFv3 DR/BDR Election Process * OSPFv3 LSA Types and Their Roles * OSPFv3 Network Topology and LSA Interpretation