单选题What dose a Layer 2 switch use to decide where to forward a received frame?（）Asource MAC addressBsource IP addressCsource switch portDdestination IP addressEdestination port addressFdestination MAC address
单选题
What dose 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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What is the purpose of unicast reverse path forwarding?（）A、to validate packet receipt on interfaces where the traffic should be receivedB、to forward packets out the interfaces where the traffic should be receivedC、to forward packets out the interfaces where the traffic should be sentD、to validate packet receipt on interfaces where the traffic should be sent
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单选题What does a Layer 2 switch use to decide where to forward a received frame?（）Asource MAC addressBsource IP addressCsource switch portDdestination IP addressEdestination port addressFdestination MAC address
单选题What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table（）。AThe switch will not forward unicast frames.BThe switch will forward the frame to a specific port.CThe switch will return a copy of the frame out the source port.DThe switch will remove the destination MAC from the switch table.EThe switch will forward the frame to all ports except the port on which it was received.
多选题Which two of these are characteristics of MPLS VPNs?（）ALayer 3 MPLS VPNs can forward only IP packetsBLayer 2 MPLS VPNs can forward any network protocolCMPLS label paths are automatically formed based on Layer 2 framesDLayer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesEIn Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
多选题What are three methods that may be use d to allow a switch to determine which ports to forward IP multicast messages to?（）AIGMPBIGMP snoopingCPIMDCGMPEstatic assignmentFCDP
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.