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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Collision can still occur if propagation delay shows two nodes not hear each other’s transmission
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Collision detection and recovery: When a node issues a frame, it tries to detect a collision. When a collision is detected, it immediately stops sending, issues a jam signal to the transmission medium, and informs it of the occurrence of the collision.
Detailed explanation-2: -In wireless, we don’t have the luxury of detecting collisions and resending packets because there’s no way to detect a collision over the air. Instead, WLANs have to make absolutely sure there is no collision. To do so, only one device in the RF region can transmit at any given time.
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