DATA LINK LAYER WIRED NETWORKS
WIRED LANS ETHERNET PROTOCOL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CRC in the trailer
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source MAC address in the header
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destination MAC address in the header
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protocol type in the header
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Detailed explanation-1: -38. When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check? Explanation: The cyclic redundancy check (CRC) part of the trailer is used to determine if the frame has been modified during transit.
Detailed explanation-2: -In store-and-forward switching, when the switch receives the frame, it stores the data in buffers until the complete frame has been received. During the storage process, the switch analyzes the frame for information about its destination.
Detailed explanation-3: -In cut-through switching, the switch acts upon the data as soon as it is received, even if the transmission is not complete. The switch buffers just enough of the frame to read the destination MAC address so that it can determine to which port it should forward out the data.
Detailed explanation-4: -The ingress port buffering process used by store-and-forward switches provides the flexibility to support any mix of Ethernet speeds.