Which interface or interface or interface are able to establish OSPF adjacency?

Refer to the exhibit.

A network engineer configures OSPF and reviews the router configuration.

Which interface or interface or interface are able to establish OSPF adjacency?
A . GigabitEthemet0/1 and GigabitEthernet0/1.40
B . only GigabitEthernet0/1
C . only GigabttEthernet0/0
D . Gigabit Ethernet0/0 and GigabitEthemet0/1

View Answer

Answer: B

Explanation:

OSPF adjacency can only be established on the GigabitEthernet0/1 interface. In the router configuration, OSPF is enabled on GigabitEthernet0/1, as indicated by the line protocol being up. The other interfaces, including GigabitEthernet0/0 and GigabitEthernet0/1.40, cannot establish OSPF adjacency due to reasons such as area mismatch or network type discrepancies.

References: = Implementing and Operating Cisco Service Provider Network Core Technologies