Multiple choice

What will happen if a collision occurs in an Ethernet network?

  1. Both stations will retransmit the data after a random wait time created by a backoff algorithm.

  2. Both stations will send out a warning on the network before they retransmit the data.

  3. A Transport layer protocol such as UDP or TCP will request a retransmission of the data.

  4. One of the stations data transmission will fail.
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A Correct answer
Explanation

The access method (how the physical wire is accessed)in an Ethernet network is Carrier Sense Multiple Access/Collision Detection (CSMA/CD). In a CSMA/CD network stations listen to check if the network is busy, if the network is free the station transmits data. When two stations listen, and both determine the network is not busy, and start sending the data simultaneously a collision occurs. When the collision is detected both stations will retransmit the data after a random wait time created by a backoff algorithm.

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