computing revision unit 1 and 2

computing revision unit 1 and 2

1. Networks

   • LAN/Local Area Network are connected over a small geographical area
     • you can connet to a LAN with an ethernet cable and a router with are both a peace of hardware
   • WAN/wide are network are conneted over a large geographical area
   • wpan is a network that connects to peripherals by using bluetooth

2. connection types

   • ethernet cable is a peace of hardware that allows you to access the internet and a LAN
   • WIFI is a software that lets you to connect to the inter net and a LAN
   • A router is a hardware connection type that emits wifi and lets you connect to a LAN and the internet
   • NETWORK THREATS AND SECURITY
     • threats
       • phishing is where someone attempts to steal your bank login or other peaces of privet information by sending you and other people a link to a fake website with no encryption and if you logon to the fake site that can now log on your real account
     • security
       • Anti-virus is a peace of software that scans your computer periodically for malware and if it finds any malicious software it would quarantine it
       • Firewall is a peace of software that controls which programs can send or receive data packets from your computer
       • encryption is a software that scrambles data packets using a cipher so that unauthorised users can not read the code without the key

3. computer Hardware

   • the CPU is a peace of hardware that