Ring topologies are used on token ring networks. Each device processes and retransmits the signal, so it is capable of supporting many devices in a somewhat slow but very orderly fashion. A token, or small data packet, is continuously passed around the network. When a device needs to transmit, it reserves the token for the next trip around, then attaches its data packet to it. The receiving device sends back the packet with an acknowledgment of receipt, then the sending device puts the token back out on the network. The most common type of cabling used for token ring networks is twisted pair, although there are nine different types that can be used. With IBM Type 1 Shielded cable, you can have up to 33 network segments with 260 devices on each. Transmission rates are at either 4 or 16 megabits per second.
Advantages
- Very orderly network where every device has access to the token and the opportunity to transmit
- Performs better than a star topology under heavy network load
- Can create much larger network using Token Ring
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