What is the preferred configuration on Switch-2 for preventing rogue OSPF routers in this network?

Refer to the exhibit.

All of the switches in the exhibit are AOS-CX switches.

What is the preferred configuration on Switch-2 for preventing rogue OSPF routers in this network?
A . Disable OSPF entirely on VLANs 10-19.
B . Configure OSPF authentication on VLANs 10-19 in password mode.
C . Configure OSPF authentication on Lag 1 in MD5 mode.
D . Configure passive-interface as the OSPF default and disable OSPF passive on Lag 1.

View Answer

Answer: C

Explanation:

To prevent rogue OSPF routers in the network shown in the exhibit, the preferred configuration on Switch-2 is to configure OSPF authentication on Lag 1 in MD5 mode. This setup enhances security by ensuring that only routers with the correct MD5 authentication credentials can participate in the OSPF routing process. This method protects the OSPF sessions against unauthorized devices that might attempt to introduce rogue routing information into the network.