Rabu, 24 Februari 2010

token ring and fddi


Token Ring uses a ring topology whereby the data is sent from one machine to the next and so on around the ring until it ends up back where it started. It also uses a token passing protocol which means that a machine can only use the network when it has control of the Token, this ensures that there are no collisions because only one machine can use the network at any given time.
The Fiber Distributed Data Interface (FDDI) specifies a 100-Mbps token-passing, dual-ring LAN using fiber-optic cable. FDDI is frequently used as high-speed backbone technology because of its support for high bandwidth and greater distances than copper
The FDDI protocol is based on the TokenRing protocol. So the diferrent FDDI and Token Ring is about the route. If one is lost then the network token ring network can not connect but FDDI can connect bacause have two route


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