networks

networks

1. advantages

   • you can use the same files on any computer
   • you can use any computer
   • you can print, email and use the internet and the same software on any computer

2. types of networks

   • LAN (local area network)
     • this type of network spreads across a single geographical area
   • WAN (wide area network)
     • this is a network that spans across a large geographical area
       • they often consist of different LANs

3. disadvantages

   • A network is very expensive to create
   • if there is an erorr it affects every computer
   • if thre is a virus or any other malicious softwarecan spread through the whole network
   • it requires a technical expertise so you cant make one if you dint have any technical expertise

4. topologies

   • ring topolgy
     • advantages
       • cheap to install
       • no collisions
     • disadvantages
       • high chance of catastrophic failure
       • hard to expand
   • bus topology
     • advantages
       • cheap to install
     • disadvantages
       • there is a high chance of catastrophic failure
       • high chance of collisions
   • star topology
     • diadvantages
       • expensive
     • advantages
       • low chance of failure
       • low chance of collision

5. network adresses

   • IP adress
     • it i a unique value assigned to every computer to identify it
     • the iternet is a huge network with more devices than its possible to assign unique adresses
     • unique adresses are assigned to to buisneses and houses
     • these houses and buisnesses run there own mini networks

6. internet

   • mesh topology
     • the internet is a giant mesh
     • these are multiple different routes between any two nodes
     • it is impossible to break the internet as it can always find a different route
   • packets
     • data is split into small chunks
     • each packet is sent along the lowest cost route
     • the packets are reassembled in order on the other side