Cisco® CCNA Exam Cram Notes : Ethernet and CSMA/CD

I. Networking Fundamentals

2. Network Topologies and Flow control

2.2 Ethernet and CSMA/CD

In Carrier Sense Multiple Access With Collision Detection (CSMA/CD), a node transmits only after listening to the media, and ensuring that no transmission is taking place. Further, sending nodes detect when a collision occurs and stop transmitting immediately, backing off for a random amount of time before trying again. This results in efficient use of the media since the bandwidth of transmitting the entire frame is not wasted.




















































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