networks

networks

1. types of network

   • LAN
     • local area network
   • WAN
     • wide area network

2. advantages

   • they run on the same system
   • they update at the exact same time
   • you can share files

3. disadvantages

   • they are expensive
   • if the network shuts down all the connected computers will shut down
   • if one is hacked they are all hacked

4. topologies

   • bus topologies
     • cheap
     • high chance of faliure
   • star topologies
     • expensive
     • low chance of faliure
   • ring topologies
     • cheap
     • high chance of faliure
     • difficult to expand
     • no collisions

5. internet

   • the internet is a mesh of computers
   • data is split into chunks called packets
   • it is impossible to break the internet
   • there are multiple routes between any two nodes
   • a cost is assigned to each connection

6. IP address

   • each computer on a network has an IP address
   • the IP address is a unique value assigned to each and every computer on a network
   • messages on a network have an IP address

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