DATA LINK LAYER WIRED NETWORKS
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It uses one pair of wires for sending data.
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It uses all wires for communication.
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It uses half duplex.
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It uses full duplex.
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Detailed explanation-1: -In full-duplex switched Ethernet, there is no need for the CSMA/CD access method because there is no the CSMA/CD access method, because there is no collision. The CSMA/CD function of the MAC sublayer can be turned off can be turned off. The whole idea in the evolution of Ethernet is to keep the MAC sublayer untouched.
Detailed explanation-2: -A hub is a simple repeater, working on the physical bitstream. Since it receives and retransmits at the same time there can be no other communication (within the collision domain). Full-duplex communication is not possible-this is a limitation of the repeater, not the cable.
Detailed explanation-3: -In full-duplex Ethernet, each node is cabled to a switch with a pair of circuits: one for transmissions to the switch and the other for transmissions from the switch. In full-duplex Ethernet, simultaneous transmission is the default–but only between the Ethernet switch and each node.