ICT Networks Topologies

ICT Networks Topologies

1. Ring Topology

   • This is a peer to peer network because there is no server
   • What
     • All the computers are arranged in a circle
     • Data is sent by one computer, it passes around the ring until it reaches the correct computer
   • Advantages
     • Network is not dependent on a central computer
     • Each computers has the same access as the others so no one computer can 'hog' the network.
   • Disadvantages
     • A break in the connection leads to a whole network fault
     • Faults are difficult to locate
     • There is only one path for data to flow

2. What Is a Topolagy

   • The Devises in a network can be setup in a nuber of different ways and the way this is done are called the topology.
   • Examples
     • Ring
     • Bus
     • Star
     • Mesh
   • A Topology show the computers are connected when wires are used and if wireless is used, it shows how the communicate with each other

3. Bus Topology

   • All devises are connected to the network by a shared common cable called the backbone. Signals are passed in either direction along the backbone
   • Advantages
     • Cost effective
       • Due to the small amount of cable needed
     • Easy to install
       • Simple cable run
     • Easy to add extra devices to the network
   • Disadvantages
     • If 12 devises are connected in this format it can degrade its performance
     • If there's a break in the backbone cable, then the network cannot be used.

4. Star Topology

   • Uses central communication point to connect all the devices on the network together.
     • The central connection point can be a hub, a switch or a router
   • Advantages
     • Fault tolerant
     • Load tolerant
     • Easy to add extra computers without disturbing the network
   • Disadvantage
     • Higher costs
       • Larger amounts of cabling
     • If center devise fails the whole network fails.