Which type of OSPF network will elect a backup designated router? Broadcast multi-access Non-broadcast multi-access Point-to-point Broadcast multipoint

1 and 2
3 and 4
3 only
None of the above

Correct Answer: 1 and 2

Explanation:

DR and BDR are elected on broadcast and non-broadcast multi-access networks. Frame Relay is a non-broadcast multi-access (NBMA) network by default. No DR is assigned on any type of point-to-point link. No DR/BDR is assigned on the NBMA point-to-multipoint due to the hub/spoke topology.

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