networks

networks

1. advantages

   • share files
     • so the same files are available whichever computer you use
   • share resources
     • such as printers and internet connection
   • share logins
     • so the same username and password can be used on every computer on the network

2. types of networks

   • LAN
     • Local area network
       • a network in a small area and single organisation
   • Wan
     • Wide area network
       • a network that spans a large area o multiple organasation

3. disadvantages

   • expensive
     • extra hardware and writing needed
   • more room for error
     • if something goes wrong it can affect every computerin the network
   • difficult
     • requires technical expertise
   • malware
     • viruses and other malicious software can spread through the network

4. network topology

   • bus topolygy
     • advantages
       • cheap to install
     • disadvantages
       • high chance of catastrophobic failure, lots of collisions and slows down as more computers are added
   • ring topology
     • advantages
       • cheap to install no collisions
       • disadvantages
         • high chance of castrophobic failure and diffucult to expand
   • star topology
     • advantages
       • low chance of failure and no collisions
         • disadvantages
           • expensive and depends on the switch

5. ip adress

   • on an ip adress is an unique value assigned to every computer on a network, used to identify it
   • messages on a network have an ip adress attached which is how a computer knows whether or not to keep the message
   • the internet is a huge network with more devices then its possible to assign a unique adress to
   • unique adresses are assigned to businesses and houses
   • these houses and buisnesses run their own mini network inside with different ip addresses