Which three options are valid WAN connectivity methods? ()
A、PPP
B、WAP
C、HDLC
D、MPLS
E、L2TPv3
F、ATM
A、PPP
B、WAP
C、HDLC
D、MPLS
E、L2TPv3
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