network

network

1. types of networks

   • Lan
     • local area network
   • wan
     • wide area network

2. advantages

   • share files
     • share resources
       • share logins

3. disadvantage

   • costs [ its super expensive]
     • increased risks [ hackers affect all on networks
       • difficulty [ experts needed to set it up ]

4. topology

   • bus
     • cheap
       • high chance of catastrophic failure
         • collisions
   • star
     • low chance of failure
       • no collisons ( fast )
         • expensive
           • if switch breaks all computers stop
   • ring
     • cheap
       • no collisions
         • high chance of catastophic failure
           • diffucult to add new computers

5. network addressing

   • messages on a network have an IP address which is the computer knows to keep the message
   • unique set of numbers from 0-255

6. the internet

   • mesh topology
     • impossible to break as it will just take other route
       • all data is split into chunks called packets
         • each packet is sent along the lowest cost route
           • the packets are re assembled on the other side