Network

Network

1. LAN

   • Local Area Network
   • Contained in a single geographic location or organisation

2. WAN

   • Wide Area Network
   • A network that spans a large geographical area, or multiple organisations

3. Disadvantages

   • Viruses
   • Can be hacked

4. Advantages

   • Log onto any PC with the same username and password
   • Files avaliable on all computers
   • Print, use the internet/email and use the same software

5. Topologies

   • Bus
     • Advantages
       • Cheap
     • Disadvantages
       • High chance of cable = falure
       • Colliding
       • More computors can cause more colliding
   • Ring
     • Disadvantages
       • High chance of failure as only one cable
       • Hard to add new computors
     • Advantages
       • Cheap to install
       • One directional so no colliding
     • Computors are connected in a ring
   • Star
     • Disadvantages
       • Expensive
       • Depends on a switch
     • Advantages
       • Low chance of failure
       • No collisions
   • mesh
     • Connected in lots of different ways
     • No collisions
     • If one cable breaks, it's still ok
     • Expensive

6. IP Addresse

   • IP = Internet Protocol
   • Unique address to identify comuptor
   • 32 bit binary number
   • As humans we convert the long binary into a decimal 8 bits at a time(x.y.z.a)
   • Can be between 0.0.0.0 (00000000000000000000000000000000) and 225.225.225.225 (11111111111111111111111111111111)
   • As we couldn't have so many unique codes, we only have a house or buisness ID that is unique and a PC ID which isn't so unique

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