What is Network? Concept & Types of Computer Networks

• Cabling layout of a network is called topology.
• Network topologies are following.

1. o  Bus
2. o  Ring
3. o  Star

Bus Topology:

• All computers are connected with a single cable called a bus.
• At the end of bus, terminator is installed that absorbs the singles.
• Data travels along the cable until it reaches to the required computer.
• Suitable for small networks.
• If any computer goes down all network will goes down.
• It uses Carrier Sense Multiple Access (CSMA) technology.

Ring Topology:

• Its shape is just like a ring.
• Each computer is connected with its to adjacent computers.
• Data will travel in one direction around the ring.
• If any computer goes down then all network will goes down.

Star Topology:

• All computers are connected with a central device called hub.
• Very popular for small networks.
• More expensive than bus topology.
• Data will send to hub than hub will send it to the required computer.
• If any computer goes down there is no effect on network.