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Chapter (2) Network Fundamental and Layered Network Architecture
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
https://www.youtube.com/watch?v=3oaAuRXC0F4
2.10.1.4 Hierarchical Topology
A hierarchical topology is created similar to an extended-star topology. The primary
difference is that it does not use a central node. Instead, it uses a trunk node from which it
branches to other nodes. Two types of tree topologies exist: the binary tree (each node splits
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