多选题Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）AService EthertypeBISLCPseudoLAN TAGD802.1q VLAN TAGEControl WordFTunnel Label
多选题
Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）
A
Service Ethertype
B
ISL
C
PseudoLAN TAG
D
802.1q VLAN TAG
E
Control Word
F
Tunnel Label
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