Token Rings MOST RINGS SOLVE THE PROBLEM OF TAKING TURNS BY PASSING A SPECIAL "ITS YOUR TURN MESSAGE" AROUND THE NETWORK. THIS SPECIAL MESSAGE IS CALLED THE "TOKEN". IF YOU HAVE A MESSAGE TO SEND, WAIT UNTIL YOU RECEIVE THE TOKEN. IF YOU HAVE A MESSAGE TO SEND AND YOU RECEIVE THE TOKEN: SEND YOUR MESSAGE(S). SEND THE TOKEN. IF YOU RECEIVE THE TOKEN AND HAVE NO MESSAGES TO SEND: JUST SEND THE TOKEN.

The Web: Technologies and Techniques Links to other course pages: CS 105 Home Page CS 105 Lecture Schedule CS 105 On-line Discussion Group: All discussions Discussion relating to this lecture topic Williams College Department of Computer Science

This page is part of a section of lecture slides related to " Ring 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