CSMA/CD = Ethernet + Appletalk POLITENESS IN A BROADCAST COMPUTER NETWORK CAN BE ARRANGED IN A SURPRISINGLY HUMAN WAY: DON'T INTERRUPT (CALLED "CARRIER SENSE"). IF YOU START TALKING AT THE SAME TIME AS SOMEONE ELSE, STOP AND TRY AGAIN A LITTLE LATER (CALLED "COLLISION DETECTION"). THIS SCHEME IS CALLED "CARRIER SENSE MULTIPLE ACCESS WITH COLLISION DETECTION" OR CSMA/CD. ETHERNET AND APPLETALK USE THIS SCHEME (ALTHOUGH THEY DIFFER IN MANY OTHER WAYS).

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This page is part of a section of lecture slides related to " Broadcast Networks " within the topic "Multi-machine Networks". Other slides within this section and other sections of slides for the topic "Multi-machine Networks" can be accessed using the links below. Too Many Wires DIRECT CONNECTIONS Switching Techniques The Telephone Network The Telephone Network (cont.) Circuit Switching A Path through the Phone System Phone System Data Services Message Switching Message Switching (cont.) PACKET SWITCHING Comparing Switching Techniques Comparing Switching Techniques (cont.) THE NEED FOR "PROTOCOLS" Broadcast Networks Broadcast Networks "Bus" Networks "Bus" Networks (cont.) A More Familiar "Bus" Network CSMA/CD = Ethernet + Appletalk Collision Detection Backoff Protocols Ethernet Advantages Ring Networks Ring Networks = Simplified Switching Token Rings Token Passing Advantages and Disadvantages of Rings