Which three options are valid WAN connectivity methods?()
A、A.PPP
B、B.WAP
C、C.HDLC
D、D.MPLS
E、E.L2TPv3
F、F.ATM
A、A.PPP
B、B.WAP
C、C.HDLC
D、D.MPLS
E、E.L2TPv3
F、F.ATM
A、Forwarding Address B、External Route C、Reference Link-State ID D、Option E、Prefix Options
A、hold priority B、setup priority C、FEC IP address D、resource availability E、local protection option
A、isolated mode B、switchport mode C、modular mode D、community mode E、promiscuous mode F、global mode