Modulen1

A topology – is the characteristic of a communication network that is concern both with the physical configuration of the cabling that is used to inter connect communicating system and the logical way in which system view the structure of the network. Topology is the therefore physical or logical arrangement of computers.

Network star topology also known as Radial topology

This topology consist of a central nodes to which all other nodes are connected, star topology is used in most existing information network involving data processing and voice communication. In many cases when a building is wired with a star topology, faced cables radiate out from the centre to intermediate connection point to wiring cables. This allows sufficient connection point to be provided for one sub – area, while providing flexibility in their allocation within that area

Advantages of star topology

* Diagnostic and isolation of problem is easy

* Easy to add a new computer system to the network

* Failure of one workstation does not affect the entire network

* Uses a single access protocols

* Provide ease of service

* Is very fast

Disadvantages of star topology

* There is central node dependency

* Becomes expensive when purchasing the nodes

* Always requires very long cable length when connecting many nodes

Bus Topology also known as Linear Topology

It is the simplest method of networking computers. It consists of a single cable known as a trunk, backbone or segment that connects all the computers in the network. Each system is directly attached to a common communication channel. Signal that is transmitted over the channel makes up the messages.  As each message passes along the channel each system receives it, after receiving the message each system examine the destination address contained in the message, if the destination address tells a particular system that the message is addressed to it, that system accepts and process the message, if the...