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1. LAN (Local Area Network

   • Computers connected over a small geographical area
   • Examples: Home network, School network, Shop network

2. WAN (Wide Area Network)

   • Computers connected over a large geographical area
   • Examples: The Internet

3. LAN vs WAN

   • LAN
     • Has its own infastructure of cabling and network hardware due to distance and practicalities
   • WAN
     • Uses external hardware and external infastructure
       • e.g use of sattelite, phone lines or the internet

4. Client server VS Peer to peer

   • Client server
     • Network relies on a central server
       • All clients (devices) request services from the server (e.g print services / file services
         • Additional hardware would be needed e.g high end powerful servers
           • All files can be stored centrally on a client server
             • Workers can access files from any computer
               • All computers can update central data bases
                 • Backups are easily managed on a client server as these can be done centrally from the file server
                   • Data is backed up in one go
                     • Individual computers do not need to be backed up
   • Peer to peer
     • All computers have equal status
       • Each device can act as a client and a server
         • All devices can request and provide network services
           • No additional hardware / software needed to set up this type of network
             • On peer to peer all files are stored on their own computers
               • Users have to log in to the same computer every time
                 • With peer to peer all computers are responsible for backing up their own files