Networks

Networks

1. A network is two or more computers linked together.

   • A network can share resources:
     • Hardware - printers, scanners etc.
     • Software - word processing, powerpoint etc.

2. Client server:

   • The server stores data for a network
   • The network is totally dependent on the server.

3. Peer to peer network:

   • Equal status
   • Suitable for home

4. LANS:

   • Local area
   • Use cables, wires etc.

5. WANS

   • Wide area networks
   • Wireless

6. Intranet:

   • Internal
   • Private network

7. Extranet

   • Allows other parties
   • Allows customer access

8. Network Topologies:

   • Star:
     • POSITIVES:
       • Fault tolerant. If one fails others can still be used
     • NEGATIVES:
       • Higher cost
   • Bus
     • POSITIVES:
       • All devices connected to backbone.
       • Simple cable runs - easy to install
     • NEGATIVES:
       • Can only hold 12 devices
   • Ring
     • POSITIVES:
       • Easy to add extra devices
     • NEGATIVES
       • Faults are difficult to locate