Networks

Networks

1. types of network

   • LAN
     • Local Area network
   • WAN
     • Wide area network

2. Topologies

   • Bus
     • Advantages
       • - cheap to install
     • disadvantages
       • - high chance of catastrophic failure
         • - lots of collisions
           • -slows down as more computers are added
   • Ring
     • Advantages
       • -cheap to install
         • - no collisions
     • Disadvantages
       • - high chance of catastrophic
         • - difficult to expand
   • Star
     • advantages
       • -low chance of catastrophic failure
         • -no collisions
     • disadvantages
       • - Expensive
         • - depends on a switch
   • Mesh
     • multiple different routes through the topolagy

3. Disadvantages

   • - very expensive - increased risk ( viruses can affect all in a network) - need an expert to install

4. Advantages

   • - share files - share resourses - share logins

5. Network Addressing

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

6. Internet

   • Packets - when data is split into small chunks
   • Route- finding the lowest cost between two nodes.