MAC in Switched Ethernet
Each circuit shared by a computer and the switch
Still CSMA/CD media access control used
- Each device (computer or switch) listens before transmitting
Multiple messages can be sent at the same time.
- Computer A can send a message to computer B at the same time that computer C sends one to computer D
- Two computers send frames to the same destination at the same time
- Switch stores the second frame in memory until it finishes sending the first, then forwards the second