BASIC CONCEPT OF NETWORK
NETWORK ARCHITECHURE
NETWORK TOPOLOGY
Types of
 network topology
Bus Network
Ring Network
Star Network








Diagram


            











Definition
 A bus network consists of a single central cable to which all computers and other devices connect (node).


 A cable forms a closed loop (ring) with all computers and devices arranged along the ring.
 All the computers and other devices on the network connect to acentral device (hub/switch), thus forming a star.


Advantages
  1. Failure of one device usually does not affect the rest of the bus network.
  2. Bus networks are inexpensive and easy to install
  1. All computers have equals access to the resources in the network.
  2. The uses of token passing enable all devices in a ring topoplogy to share the network resources fairly.
  1. Easy to troubleshoot and isolate probelm.
  2. Devices (pc/printer) can be added to or removed from network with little or no disruption.


Disadvantages
  1. The network will be malfuctioned if the single central cable breaks down.
  2. If more computers are connected, the performance of the network will become slower because of data collision.
  1. The network will be malfunctioned if the device (pc/devices) breaks down.
  2. A ring network can span a larger distance than a bus network, but it is more difficult to install.
  1. The network will be malfunctioned if the hub or switch break down.
  2. Requires more cable than most of the other topologies.