1.4 wired and wireless networks

1.4 wired and wireless networks

1. why do we need networks

   • users can share files
   • users can share peripherals printers and connections to other networks
   • files can accessed from any computer on the network
   • servers can control security, software and backup of data
   • communication with other people on the network is easier

2. LAN

   • Local area network
   • covers small geographic area
   • all hardware needed for LAN is owned by the organisation
   • LAN's are wired using UTP (un-shielded twisted pair ) fibre optic cable or wirelessly using wifi
   • connected via a switch

3. WAN

   • Wide Area Network
   • covers a large geographic area
   • connects LAN's together
   • WAN's are connected via telephone wires, fibre optic cable or satalite links
   • connected via a router

4. disadvantages to networking

   • increased security risk to data
   • malware and viruses spread very easily
   • if server fails, the computers connected to it may not work
   • computer may run more slowly if lots of data is travelling on the network