A.L2TPv3 Frame Relay support includes only 32-bit DLCI addressing
B.L2TPv3 sessions do not support Frame Relay LMI interworking
C.Multipoint DLCI is not supported
D.To use DCE or a Network-to-Network Interface on a Frame Relay port， you must configure the frame-relay switching command
E.L2TPv3 feature does not support Frame Relay extended addressing

A.To enable OSPF authentication in a network， OSPF area 0 authentications must be enabled first
B.The payload of OSPF version 3 packets contains no authentication information
C.OSPF version 3 supports Advanced Encryption Standard
D.OSPF version 3 uses router ID as a key to encrypt OSPF hello packets
E.OSPF MD5 authentication uses TCP， and Plan Test authentication uses UDP