Networks

Networks

1. A collection of computers all connected together so they can communicate to each other.

   • LAN (Local Area Network) - suitable for small geographical areas such as homes and businesses.
   • WAN (Wide Area Network) - suitable for large geographical areas, the World Wide Web is a WAN.

2. NETWORK TOPOLOGIES

   • Ring Topology - all computers are connected in a circle with cables.
     • Fast as all data travels one way through the cables
     • If one cable breaks then the whole network will not work.
   • Bus topology - all computers are joined using one big cable called the back bone.
     • They are cheap and easy to install
     • If the backbone breaks the whole network doesn't work.
     • Too many computers can slow down the network
   • Star topology - all computers are connected directly to a server using hubs or switches.
     • If one of the cables break, it will not affect the network
     • Fast as each computer is directly connected to the server.
     • It is expensive to buy hardware like hubs and switches.

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