Network Topologies with examples

Network Topologies

• Network topology defines the structure of the network.
• One is physical topology, which is the actual layout of the media.
• The other one is logical topology, which defines how the media is accessed by the hosts for sending data.

Physical Topologies

Bus Topology:

Bus topology is a method of physical connectivity.

In bus topology all the hosts connect directly to single cable.

Media: BNC connector, Coaxial cable.

Ex: - Cable T.V Connections

Ring Topology:

In this ring topology each host connects to the next host. Like all hosts connects each other. More cables and NIC card are used.

Note: Mostly this topology used in Railways.

Star Topology:

In star topology all hosts are connects to a central point of concentration. This centralize devices is called as Hub, Switch.

Note: It commonly used topology in LAN.

Media: Hub, Switch, Cat cables, RJ45 Connectors.

Extended Star Topology: Extended star topology links individual stars together by connecting the hubs (or) switches.

This topology can extend the scope and coverage of the network.

Hierarchical topology: Hierarchical topology is combination of two/more topologies.

Ex: - star topology, ring topology.

Mesh topology: Mesh topology each computer directly connects to other computer. Used No. of cables and NIC cards.

Mostly this topology used for wireless communication

Ex: - Telephone towers.