多选题Which of the following troubleshooting targets is considered to be a Layer 2 issue？（Choose allthat apply.）（）ASpanning Tree ProtocolBCablingCFrame forwardingDPacket forwardingEEtherChannelFRouting protocols
多选题
Which of the following troubleshooting targets is considered to be a Layer 2 issue？（Choose allthat apply.）（）
A
Spanning Tree Protocol
B
Cabling
C
Frame forwarding
D
Packet forwarding
E
EtherChannel
F
Routing protocols
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