Networks.

Networks.

1. Advantages

   • Share files
     • The same files are available whichever computer you use
   • Share resources
     • Such as internet connection / printers
   • Share login
     • The same username and password can be used ion every computer

2. Disadvantages

   • Cost
     • Expensive to maintain
   • Difficulty
     • Expertise is needed to set up and maintain
   • Risk
     • Viruses can affect every computer on the network

3. LAN

   • Local Area Network

4. WAN

   • Wide Are Network

5. Topologies

   • Bus
     • advantages
       • Cheap
     • dissadvantages
       • High chance of failure
       • Collisions
       • Slows down as computers are added
   • Ring
     • Advantages
       • Cheap
       • No collisions
     • Disadvantages
       • High chance of failure
       • Difficult to expand
   • Star
     • Advantages
       • Fast
       • Easy to add computers
       • Low chance of failure
     • Disadvantages
       • Expensive e.g. needs cabling and a central switch
       • Failure of switch will shut down network

6. IP Addresses

   • A unique value assigned to every computer on a network used to identify it
   • Unique addresses are assigned to houses and businesses
     • They run their own mini-network inside with different IP addresses

7. Internet

   • A packet is where you send a little bit of information to the other computer at a time they get numbers so they can join back at the end
   • A cost is a assigned connection in mesh
   • the world is made up of the words interconnected network