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单选题
What information is used by a switch to forward an Ethernet frame to its destination?（）
A
IP address
B
destination MAC address
C
ARP table entry
D
FCS checksum
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Which two statements are true regarding an Ethernet collision domain?（）A、If a switch is used, the collision domain includes all devices connected to the switch.B、If a hub is used, the collision domain includes all devices connected to the hub.C、If a hub is used, the collision domain is limited to each device and the hub.D、If a switch is used, the collision domain is limited to each device and the switch.
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单选题What is the name of the VTP mode of operation that enables a switch to forward only VTPadvertisements while still permitting the editing of local VLAN information?（）A
serverB
clientC
tunnelD
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单选题What dose a Layer 2 switch use to decide where to forward a received frame?（）A
source MAC addressB
source IP addressC
source switch portD
destination IP addressE
destination port addressF
destination MAC address
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