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Dual-ring topology is a network redundant topology where nodes are connected using two concentric rings with four branches. Dual-ring topology is ideal for applications with cabling issues or small networks that are not frequently reconfigured.
Though more expensive than star or extended star topologies, dual-ring is the most cost-efficient redundant topology.
Techopedia Explains Dual-Ring Topology
Dual-ring topology is made up of two rings connected to a network. Each ring works independently until one is disabled when the network fails. When this takes place, the functioning ring automatically wraps around the disabled ring to ensure data flow.
Ring topology advantages include:
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- Speed and reliability
- Uninterrupted long distance communication
- Terminators are not required
Ring topology disadvantages include:
- Network issues from bad ports or malfunctioning Media Access Unit (MAU) cards
- Negative network impact from any added,altered or damaged device
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