Given the following partial configuration for Router A:
interface serial 0
ip address 10.1.1.1 255.255.255.0
encapsulation frame-relay
ip ospf network point-to-multipoint
router ospf 7
network 10.1.1.0 0.0.0.255 area 0
Which two statements are correct? (Choose two.)
Select 2 response(s).
A.
DR/BDR elections do not take place.
B.
The router is restricted to a hub and spoke topology.
C.
The area 0 NBMA cloud is configured as more than one subnet.
D.
OSPF neighbor statements are not necessary.
Answer: A D
Explanation
The command “ip ospf network point-to-multipoint” configures this interface as point-to-multipoint for broadcast media. In broadcast networks, there is no need to specify neighbors. No DR or BDR is elected in this network type.
Note: If we configure this interface as a point-to-point non-broadcast (with the “ip ospf network point-to-multipoint non-broadcast” command) then we need to manually declare the OSPF neighbors.
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