networks

networks

1. advantages

   • share logins
   • share files
   • share resources

2. disadvantages

   • cost
   • difficulty
   • increased risk

3. types of network

   • WAN: is a wide area of network over a large area
   • LAN: is a local network based in a small area

4. Topology

   • ring topology
     • advantages:
       • cheap to install
       • no collisions (fast)
     • disadvantages:
       • high chance of catastrophic failure
         • difficult to expand
   • bus topology
     • advantages
   • star topology

5. IP Address

   • An IP Address is a unique value assigned to every computer on a network, used to identify it.
   • Messages on a network have an IP Address attached, which is how a computer knows whether or not to keep a message.

6. internet

   • packets
     • data is split into small chunks called packets
       • each packet is sent along the lowest cost route
         • the packets are re-assembled on the other side.
   • the internet is a gaint mesh of computers.
     • these are multiple different routes between any two nodes
       • it is impossible to break the internet since another route can always be found