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By andrew_granados ·
Explain why the delivery time of an Ethernet frame is not bounded. Why CSMA/CD protocol cannot be used in wireless LANs and CSMA/CA is used instead.

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by rindi1 In reply to CSMA/CD

This sounds like an exam question, I'm sure you can find the necessary info yourself!

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Don't answer if you don't want to..

by ckavinda In reply to

To the guy, who made the previous comment about this question being an exam question. -
"Man.. Don't try to be a big d***, if you don't wanna answer the question. We are here to help each other, not to judge."

Here's the answer..

CSMA/CD specifies that a node should listen to the medium before starting a transmission and during the transmission. But wireless antennas lose the ability to receive signals during transmission. That's one of the reasons you can't use CSMS/CD with wireless network. And the other problem is called the hidden terminal problem. As an example, two nodes, Node X and Y are within the range of the receiver Z, but not within each others' range. These node cannot detect transmissions from each other, which can lead to a collision. That's another reason why CSMS/CD cannot be used with wireless LANs.

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by nirandi In reply to CSMA/CD

i had the same question. i thought may be its because with CSMA/CD in wireless the network will seem collided all the time hence it will withhold transmitting.

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