networks

networks

1. disadvantages

   • it can be expensive
   • theres more room for error
   • it can be difficult
   • viruses will affect all the computer on the network

2. advantages

   • you can log in from anywhere
   • files are available to anyone
   • you can use the same features from any computer

3. types of network

   • lan
     • local area network
     • a network contained in a single geographical location or organisation
   • wan
     • wide area network
     • A network that spans a large geographical area, or multiple organisations
     • normally made up of multiple lans networked together

4. A network is a group of computers connected together so they can communicate

5. networks allow computers to...

   • 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

6. topology

   • star
     • all computers are connected to one central switch
     • advantages
       • easy to add new computers
       • its fast
       • low chance of catastrophic failure
     • disadvantages
       • its more expensive
       • failure of the switch will take down the whole network
   • bus
     • consists of a single cable that runs through the network
     • advantage
       • cheap to install (one wire needed)
     • disadvantage
       • high chance of failure
       • high chance of collisions
       • the network gets slower as it gets bigger
   • ring
     • computers connected in a ring
     • advantage
       • cheap to install (one wire needed)
     • disadvantage
       • chance of failure
       • difficult to add new computers

7. network addressing

   • ip= internet protocol
   • unique addresses are assigned to businesses and houses
   • these houses and businesses run their own mini- network inside with different ip adresses
   • the internet is a huge network with more devices than its possible to assign a unique address to

8. the internet