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Submitted by ctranquill on November 22, 2005
Category: Technology
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Mesh, Bus, Ring and Star topologies
The term Topology refers to the physical or logical shape or layout of a network. Communication between different nodes within a network is determined by its topology. Mesh, Bus, Ring and Star are four of the most common network topologies, each with advantages and disadvantages in relation to each other.
Mesh Topology
The Mesh topology is true to its name in that there are multiple redundant interconnections between network nodes. A mesh network can employ one of two connection arrangements, full mesh or partial mesh. Full mesh topology is when each node is directly connected to every other node on the network. Partial mesh topology occurs when some nodes are connected to every other, but others are only connected to those with which they will exchange the most data.
Mesh networks are reliable, stable, and redundant. If a node can no longer operate, all the others are not affected as they can still communicate either directly or through one or more intermediate nodes. Mesh networks can be very expensive due to the large amount of cable and connections required.
Bus Topology
Bus topology refers to a local area network (LAN) arrangement where each node or device is connected to a main cable or link called a bus. A bus network is simple yet very reliable. Since nodes themselves are not relied upon for communication, the failure of a single node is not problematic for the rest of the network. For a major issue to occur, there must be a problem with the bus itself.
Despite its simplicity and reliability the bus network does have several limitations. The cable length of the bus is limited due to data loss. Also, a bus network may have performance issues if the nodes are located at scattered points and due not lie near a common line.
Ring Topology
Ring networks are those in which the nodes are connected in a closed loop configuration. Nodes adjacent to...
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