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What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?（）
- A、The frame is dropped.
- B、The frame is addressed with a broadcast MAC address and sent out all ports.
- C、The frame is sent out all ports except the receiving port.
- D、An ARP request is sent out all ports except the receiving port.
- E、A destination unreachable message is sent back to the source address.
- F、None of the above.
参考答案
更多 “What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?（）A、The frame is dropped.B、The frame is addressed with a broadcast MAC address and sent out all ports.C、The frame is sent out all ports except the receiving port.D、An ARP request is sent out all ports except the receiving port.E、A destination unreachable message is sent back to the source address.F、None of the above.” 相关考题
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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 addressB
source IP addressC
source switch portD
destination IP addressE
destination port addressF
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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单选题How does a switch respond when it receives a message?（）A
It reads the Layer-5 information and sends the message directly to the intended computer.B
It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.C
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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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