Question: If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a loopback interface?
[A].
The lowest IP address of any physical interface |
[B].
The highest IP address of any physical interface |
[C].
The lowest IP address of any logical interface |
[D].
The highest IP address of any logical interface |
Answer: Option B
Explanation:
At the moment of OSPF process startup, the highest IP address on any active interface will be the Router ID (RID) of the router. If you have a loopback interface configured (logical interface), then that will override the interface IP address and become the RID of the router automatically.