Collisions cannot be avoided. If a collision is detected
the transmission has to be repeated. If a collision
occurs, the transmitting station recognizes the interference
on the network and transmits a bit sequence called
jam. The jam helps to ensure that the other transmitting
station recognizes that a collision has occurred.
After a random delay, the stations attempt to retransmit
the information and the process begins again.
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Reminder:
the collision problem in a Bus-topology
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