The network topology. Ethernet is a bus network, whereas token ring and FDDI are ring networks;
Their bit rates. The standard Ethernet uses a bit rate of 10 Mbps whereas FDDI uses 100 Mbps and token ring uses 16 Mbps;
Their mode of access. Ethernet is a contention-type network where all nodes on a segment contend to get access to the network, whereas token ring and FDDI network have a token which is passed from node to node. The token-passing method allows all nodes on the network an equal share of the data interchange.
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