The proper arrangement or mapping of computer resources, remote devices and other communication facilities is known as network topology.
A topology can be considered as network's shape. It can also be considered as the geometrical representation of the relationships of all the links.
There are five basic network topologies as stated below:
Combining any of the above or all of the above we can create one more topology:
6. Hybrid topology
We will learn in details about each of the listed topologies in upcoming section of this tutorial.
Topology selection factors
There are several factor that must be properly accesed before making selection of particular topology.
The network should be chosen such that it should be well functionable and requiring minimum installation costs. For this good understanding of the requirement and media is needed and to some extent minimize the distance between the devices.
The topology selected should be easiliy reconfigurable thus allowing adding and removing nodes as per requirements.
Network topology should provide the way of detecting the location of the fault and also the means of isolating the defected nodes thus increaing reliability.
Apart from the above factors, few other factors must also be accessed:
Desired performance of the system
Number of nodes and their geographical distribution of the network
Expandability of the system
Availability of communication lines
Acceptable delays in routing information between two nodes.