Computing

Computing

1. Networks

   • LAN
     • Local Area Network
       • Connected over a small geographical area
         • WiFi
           • Advantages
             • Good for connecting portable devices to a LAN.
           • Disadvantages
             • Slower data transfer speed compared to Ethernet.
               • Can be hacked by unauthorised users
               • Limited range (unless you use a wifi extended)
         • Ethernet
           • Advantages
             • Has a range of 100 metres
             • Faster data transfer speed compared to wifi.
           • Disadvantages
             • Cables are more expensive than using a wifi connection.
   • WAN
     • Wide Area Network
       • Connected over a large geographical area
         • GPRS
           • Advantages
             • Can be used on the move
             • Good for mobile devices such as smartphones
           • Disadvantages
             • Limited/slow connection speed in some locations.
             • Mobile data can be expensive - requires a SIM card
   • WPAN
     • Wireless Personal area Network
       • Pairs devices together over a short range
         • Bluetooth
           • Disadvantages
             • Can be hacked
             • Has a short range
           • Advantages
             • Up to seven devices can be paired at once

2. Connetion types

3. Network hardware

   • Router
     • So that all of the devices can connect to a central point in a local area network. Most routers will have WiFi and Ethernet connections
     • They allow you to share resources such as your internet connection, printers and files across different devices.
     • Most routers can connect you to a wide area network (such as the Internet) as it has a modem built in.
   • Switch
     • Switches can connect to other switches and routers to build large local area networks (like a school).
     • So that all of the devices can connect to a central point on a local area network.
   • Ethernet Cable

4. Network threats and security

5. Computer hardware

6. Performance upgrades