Networks

Networks

1. advantages

   • your files are available from anywhere
     • you have a consistent user experience
       • you can access the internet and emails from anywhere

2. disadvantages

   • expensive
     • more room for error
     • difficult
     • malware viruses

3. types of networks

   • LAN
     • A network contained in a single geographical location or organisation
   • WAN
     • a wide area network
       • often consists of lots of LAN networks joined together
     • a network that spans a large geographical area, or multiple organistaions

4. Topologies

   • bus topology
     • The network consists of a single cable that runs through the network
       • all devices attach to this one single cable
     • Disadvantages
       • if it breaks all of the computers connected will have problems
       • advantages
         • it is cheap to install ( only one cable )
   • ring topology
     • computers are connected to each other in a ring
       • communication only goes in one direction
         • no central cable, each connection is between two computers
           • Advantages
             • cheap to install
               • no collisions
           • disadvantages
             • high chance of catastrophic failure
               • difficult to add new computers
   • star topology
     • all connections are connected to a central switch
       • the switch directs the traffic to the appropriate computer
     • advantages
       • fast
         • easy to add new computers
           • low chance of catastrophic failure
     • disadvantages
       • expensive
         • failure of the switch will take the network down

5. Network addressing

   • An address is a unique identifier given to something.
   • ip address
     • it is a 32-bit binary value.
     • devices on the internet need an ip address
     • it stands for internet protocal address

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