Network Topology
A network can be made in different ways. The physical layout or arrangement of connected devices in a network is called topology. it is the shape of network. Topologies are divided in to Five groups.
- Bus Topology
- Ring Topology
- Star Topology
- Tree Topology
- Mesh Topology
Bus Topology
Bus topology is the simplest type of network topology. It supports a small number of computers. In bus topology, all the computers are connected to a common communication medium. His medium is often a central wire known as bus. A collision can occur in bus topology if two computers transmit data at same time.
Ring Topology
In ring topology each computer is connected to the next computer with the last one connected to the first. Thus, a ring of computers is been formed. Every computer is connected to next computer like a ring, and each computer receives message from the previous computer and transmits it to the next computer. The message flows in one direction. The message is passed around the ring until it reaches to destination.
Star Topology
All computers in star topology are connected with central device called hub or switch. Star topology is mostly used in client server networks. For example if the sending computer sends the data to hub or switch. The hub/switch sends data to the receiver computer. Each computer in his topology need to communicates with hub/switch.
Tree Topology
Tree topology combines the characteristics of bus and star topologies. It consist of different groups of computers attached in star topology. These groups are then connected to a backbone cable. Tree topology is used tfor the expansion of an existing network.
Mesh Topology
In mesh topology every computer is physically connected to every other computer in the network. A message can be sent of different possible path from source to receiver. This topology proves improves performance and reliability and I it not used much in Local Area Network. It is mostly used in Wild Area Network.
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