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.

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