Networks

Networks

1. Disadvantages

   • Expensive, requires a lot of money and time for wires, etc.
   • More room for error, if something goes wrong all computers are affected
     • Malware can be easily spread affecting all computers from the harmful files

2. Advantages

   • More convenient for users
     • Passwords shared between computers
     • Files can be shared between computers and people
     • Resources, such as printers and internet shared

3. Types of Networks

   • LAN
     • Local Area Network
     • Located in a singular area/organisation
     • May be apart a bigger WAN
   • WAN
     • Wide Area Network
     • Contained in multiple organisations/areas
     • Usually multiple LANs combined

4. Topology

   • Star
     • Disadvantages
       • Quite expensive.
       • Entire network fails if the switch is broken.
     • Advantages
       • No chance of critical failure from cables.
       • Fast connection, no collisions.
       • Easy to add new computers.
   • Bus
     • Disadvantages
       • High chance of critical failure, all one wire.
       • Lots of collisions, slow.
     • Advantages
       • Cheap and easy to set up
   • Ring
     • Disadvantages
       • High chance of critical failure.
       • Not easy to add new computers
     • Advantages
       • Not many collisions, not too slow
       • Relatively cheap to set up
   • Mesh
     • Advantages
       • No chance of critical failure
       • No chance of collisions.
     • Disadvantages
       • Expensive, very expensive..
     • Used by the internet.

5. IP Address

   • Every IP Address is unique,
   • IP Addresses format in 32 bits and can't go over 255 per "."
   • A unique series of numbers belonging to every network of devices. eg, 53.26.106.187
   • IP Addresses are used to identify you over the web.
   • IP Addresses convert from binary to " numbers "

6. The Internet

   • Uses mesh topology.
   • Transports things in packets.

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