4/7/2024 0 Comments Two dots cheats redditIf the stations hear their own transmission returning in a garbled form, as would happen if some other station had begun to transmit its own message at the same time, then they know that a collision occurred. Ethernet nodes also listen to the medium while they transmit to ensure that they are the only station transmitting at that time. We both hear the other speak at the same time we are speaking, so we can stop to give the other person a chance to go on. In our conversation, we can handle this situation gracefully. In Ethernet terminology, a collision occurs when we both spoke at once. You and I both have something we would like to add, and we both "sense the carrier" based on the silence, so we begin speaking at approximately the same time. Let’s go back to our dinner table analogy and imagine that there is a momentary lull in the conversation. Carrier-sense multiple access gives us a good start in regulating our conversation, but there is one scenario we still need to address.
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