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单选题
What does a Layer 2 switch use to decide where to forward a received frame?（）
A
source MAC address
B
source IP address
C
source switch port
D
destination IP address
E
destination port address
F
destination MAC address
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多选题For what two purposes does the Ethernet protocol use physical addresses？（）Ato uniquely identify devices at Layer 2Bto allow communication with devices on a different networkCto differentiate a Layer 2 frame from a Layer 3 packetDto establish a priority system to determine which device gets to transmit firstEto allow communication between different devices on the same networkFto allow detection of a remote device when its physical address is unknown
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考题
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
考题
多选题What are two characteristics of "store and forward" switching?（）ALatency fluctuates regardless of frame size.BThe switch receives the complete frame before beginning to forward it.CLatency through the switch varies with frame length.DThe switch checks the destination address upon receipt of headers.
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