COMPUTER NETWORKS TOPOLOGY

What is a Topology???? The physical topology of a network refers to the configuration of cables, computers, and other peripherals. Physical topology should not be confused with logical topology which is the method used to pass information between workstations. 

TYPES OF PHYSICAL TOPOLOGIES

• Linear bus
• Star
• Tree

1.Linear Bus

A linear bus topology consists of a main run of cable with a terminator at each end. All nodes (file server, workstations, and peripherals) are connected to the linear cable.

 

Figure 1 : Linear bus

2.Star

 A star topology is designed with each node (file server, workstations, and peripherals) connected directly to a central network hub, switch, or concentrator.


Data on a star network passes through the hub, switch, or concentrator before continuing to its destination. The hub, switch, or concentrator manages and controls all functions of the network. It also acts as a repeater for the data flow. This configuration is common with twisted pair cable.However, it can also be used with coaxial cable or fiber optic cable.

 

Figure 2 : Star 

3.Tree

A tree topology combines characteristics of linear bus and star topologies. It consists of groups of star-configured workstations connected to a linear bus backbone cable.


Tree topologies allow for the expansion of an existing network, and enable schools to configure a network to meet their needs.

 

Figure 3 :Tree