Networks

Networks

1. Types

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

2. Advantages

   • You can log onto any computer
   • data and files can be accessed on all computers
   • share printers etc

3. Disadvantages

   • cost very expensive
   • increased risk - viruses can affect all computers

4. topologies

   • Bus topology
     • advantages
       • cheap to install
     • disadvantages
       • high chance of catastrophic failure
       • lots of collisions
       • slows down as more computers are added
   • ring topology
     • advantages
       • cheap to install
       • no collisions
     • disadvantages
       • high chance of catastrophic failure
       • difficult to expand
   • star topology
     • advantages
       • low chance of failure
       • no collisions
     • disadvantages
       • expensive
       • depends on a switch

5. IP Adress

   • An IP Address is a unique value assigned to every computer on a network used identify it.

6. Internet

   • packets
     • Small chunks of data
   • routes
     • Routing happens before you transmit data. You have to find the fastest and cheapest route
   • mesh topolgy
     • A mesh topology is the arrangement of computers when they are all connected to one another