Refer to the exhibit. If no router ID was manually configured, what would router Branch1 use as its OSPF router ID?
- 10.0.0.1
- 10.1.0.1
- 192.168.1.100
- 209.165.201.1
Answers Explanation & Hints: In OSPFv2, a Cisco router uses a three-tier method to derive its router ID. The first choice is the manually configured router ID with the router-id command. If the router ID is not manually configured, the router will choose the highest IPv4 address of the configured loopback interfaces. Finally if no loopback interfaces are configured, the router chooses the highest active IPv4 address of its physical interfaces.