DATA LINK LAYER WIRED NETWORKS
MULTIPLE ACCESS PROTOCOLS MAC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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continuously sense the medium
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randomly sense the medium
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don’t sense the medium
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none of the above
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Detailed explanation-1: -1-Persistent, Non-Persistent, P-Persistent, and O-Persistent are the three access methods of CSMA.
Detailed explanation-2: -The algorithm of p-persistent CMSA is: When a frame is ready, the transmitting station checks whether the channel is idle or busy. If the channel is idle then it transmits the frame immediately. If the channel is busy, the station waits and continually checks until the channel becomes idle.
Detailed explanation-3: -The Non-persistence sends when the channel is idle. The 1-persistent will continuously sense the channel for the frames transmission, it will not wait. The Non-persistent waits for the random amount of time to check the carrier. In 1-persistence the chance of collisions is more.