You Are a Network Administrator for the P4S Ltd

Multiple Choice

You are a network administrator for the P4S Ltd. You are tasked to add a new OSPF router to an existing network. Later, you discover that two existing routers in the same area as the new router are using different MD5 keys to authenticate their neighbor relationships. Which option is correct if the new router is connected by means of a separate interface?

A) The three routers need to be in three different areas.
B) The MD5 keys on the two neighboring routers must be changed to the same key.
C) Each router must have a unique MD5 key to sign packets with.
D) Each interface may have a unique MD5 key to sign packets with.