Which of the following network types have a designated router and a backup designated router assigned? Broadcast Point-to-point NBMA NBMA point-to-point

1, 2 and 3
1 and 3
3 and 4
All of the above

Correct Answer: 1 and 3

Explanation:

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. 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.

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