Networks

Networks

1. Types of network

   • LAN (local Area Network)
     • over one geographical
   • WAN (Wide Area Network
     • over multiple geographical locations
   • Advantages
     • Any computer can have your files
     • You can send images and messages to other computers
     • If your computer breaks then the server will have it so you don't lose all of your files

2. Disadvanteges

   • You are easily hacked
   • if one computer connected to the server has a virus all computers get the virus

3. Topology

   • bus
     • Advantages
       • cheap
       • easy to add new computers
     • disadvantages
       • data collisions- data hits other files and ends up in the wrong place
       • if one cable breaks they all break
   • star
     • advantages
       • low chance of catastrophic failure
       • very fast
       • easy to add new computers
   • ring
     • advantages
       • no collisions
       • cheap
     • disadvantages
       • if one computer is turned off the whole network wont work
       • easy to intercept messages and read them even if your not suppossed to
   • mesh
     • Advantages
       • no catastrophic failure
     • disadvantages
       • expensive

4. IP ADDRESS

   • an ip address is a unique location of every single computer
   • ONLY 4 BILLION
   • There is local and private