OSPF is defined on a Frame Relay interface providing point-to-point connections. The remote neighbors can reach this central site, but are complaining of routing failures between each of the remote sites. The central router has all the routers for each remote site. Based on this information, what can be diagnosed as the biggest potential problem?
A.
An over-subscribed Frame Relay switch will cause some packet loss
B.
There are problems in the use of OSPF Authentication
C.
There is an incorrect selection of the Designated Router
D.
There is an incorrect DLCI assigned on a point-to-point sub-interface