Question

A network engineer is configuring single-area OSPFv2 on a router that has no 'router-id' command configured under the OSPF process and no loopback interfaces. The router has three active physical interfaces with IP addresses 10.1.1.1/30, 172.16.5.9/24, and 192.168.100.2/24. When the OSPF process starts, which value will the router use as its OSPF router ID?

Accepted Answer

192.168.100.2, because it is the highest active physical interface IP address

Answer

10.1.1.1, because it is the numerically lowest interface IP address

Answer

172.16.5.9, because it belongs to the largest subnet mask range

Answer

0.0.0.0, because a manual router-id is required for OSPF to start