Question: Which of the following network types have a designated router and a backup designated router assigned?
[A].1, 2 and 3
1 and 3
3 and 4
All of the above
[A].
[B].
[C].
[D].
Answer: Option B
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.