Page 46 - Handout Computer Network.

frame then continues around the ring until it finds the destination node, which takes the data out of
the frame. The advantage of using this type of method is that there are no collisions of data packets.

Two types of rings exist: ■ Single ring ■ Dual ring

2.10.1.3.1. Single Ring, as shown in Figure 2-24, all the devices on the network share a single
cable, and the data travels in one direction only. Each device waits its turn to send data over the
network. Most single-ring topologies are actually wired as a star.

Figure 2-24 shown an Extended- Star Topology of Network Devices

2.10.1.3.2. Dual Ring, two rings allow data to be sent in both directions, as shown in Figure 2-
25. This setup creates redundancy (fault tolerance), meaning that if one ring fails, data can be
transmitted on the other ring. Also, if both rings fail, a “wrap” at the fault can heal the topology back
into a ring.

Figure 2-25 shown a Dual Ring Topology of Network Devices

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