COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a frame enters a port, the source IP address is copied from the frame header.
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When a frame enters a port, the destination IP address is copied from the frame header.
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When a frame enters a port, the destination MAC address is copied from the frame header.
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When a frame enters a port, the source MAC address is copied from the frame header.
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Detailed explanation-1: -Bridges and switches learn addresses by copying the MAC address of the source device and placing it into the MAC address table. The port number that the frame entered is also recorded in the table and associated with the source MAC address.
Detailed explanation-2: -As each frame is received on each port, the switching software looks at the source address of the frame and adds that source address to a table of addresses that the switch maintains. This is how the switch automatically discovers which stations are reachable on which ports.
Detailed explanation-3: -To forward the frame, the switch examines the destination MAC address and compares it to addresses found in the MAC address table. If the address is in the table, the frame is forwarded out the port associated with the MAC address in the table.
Detailed explanation-4: -When a switch receives a frame on a port and floods the frame, what does it do with the frame? Forwards it out to all other connected ports. You have two-eight port switches. On each switch, seven stations are connected to ports, and the two switches are connected with the eighth port.