What router ID is used for Switch 3?

Refer to the exhibit.

The router ID has not been manually configured.

What router ID is used for Switch 3?
A . 192.168.100.2
B . 192.168.100.0
C . 10.0.2.1
D . 10.0.1.1

Answer: D

Explanation:

In the absence of a manually configured router ID, OSPF typically uses the highest IP address on the switch’s active interfaces. For Switch 3 in the exhibit, the highest IP address is 10.0.1.1 on Loopback 0. Therefore, 10.0.1.1 is used as the router ID for Switch 3.

References:

Dell Technologies SONiC documentation

OSPF Configuration Guide