If busy, then the sender waits until the media becomes idle. CSMA CA: CSMA CA (Collision Avoidance) is an access method used to avoid the collision by checking whether the transmission media is busy or not.Therefore, it works on " recovery after the collision". Once the collision is detected, the sender will stop transmitting the data. CSMA CD: CSMA CD ( Collision detection) is an access method used to detect the collision.There are two alternative ways of handling the problems that occur when two nodes send the messages simultaneously. The most common access method of the bus topologies is CSMA (Carrier Sense Multiple Access).ĬSMA: It is a media access control used to control the data flow so that data integrity is maintained, i.e., the packets do not get lost.The backbone cable is considered as a "single lane" through which the message is broadcast to all the stations. ![]() The configuration of a bus topology is quite simpler as compared to other topologies.The bus topology is mainly used in 802.3 (ethernet) and 802.4 standard networks.All the stations available in the network will receive the message whether it has been addressed or not. When a node wants to send a message over the network, it puts a message over the network.Each node is either connected to the backbone cable by drop cable or directly connected to the backbone cable. ![]()
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