networks

networks

1. advantages

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

2. disadvantages

   • cost
     • networks are expensive to set up
   • increased risk
     • prblems such as viruses can affect every computer on the network
   • difficulty
     • expertise is needed to ser up and maintain a network

3. lan

   • local area network
     • a network in a small area or singular organisation

4. wide area network

   • wan
   • a network that spans a large area or multiple organitation

5. topologies

   • bus topology
     • cheap to instal one wire needed
     • high chance of catstrophic failure
     • slows down
     • lots of collisions
   • ring topologies
     • cheap to install
     • no collisions
     • high chance of catasrophic failure
     • difficult to expand
   • star topology
     • low chance of failure
     • no collisions fast
     • expensive
     • depends on switch

6. ip addresses

   • every computer has there own ip address used to identify it
   • messages on a ntwork have an ip address attackes, which is how a computer knows whether or not to kepp the message
   • the internet is a huge network with more devices to assign a unique address to
   • unique address is a huge network with more devices to assinged to businesses and houses.
   • these houses and businesses run their own min network inside with different ip address