Networks

Networks

1. 2 or more computers linked together

   • Share Resources
     • Hardware e.g. Printer
     • Software e.g. Google
     • Data e.g. photos
     • Internet Connection

2. Peer to peer

   • Equal Status
   • All computers share resources
   • Small/Home Network
   • Basic Knowledge needed
   • The more people, the slower the network

3. Client Server Networks

   • one powerful computer called the server
   • Store the data for the network
   • Programs are stored on the server
   • Network is Totally dependant

4. Lans

   • Local area Network
   • Small area
   • Cable, Wireless, Infrared and microwave links
   • Cheap to build and run

5. Wans

   • Expensive to build and run
   • wide areas
   • expensive telecommunication lkinks

6. TOPOLOGIES - Ring

   • Advantages
     • Easy to add extra devices
     • Same access
   • Disadvantages
     • Hard to find faults
     • fault can break whole network
     • Hard to add hardware

7. Topologies

   • Bus
     • Linked to shared cable called a backbone
     • Signals are passes in either direction
     • Cost effective
     • Simple cables
     • Easy to add devices
   • Star
     • Advantages
       • Fault tolerant
       • Load tolerant
       • Easy to add extras
     • Disadvantages
       • Higher costs
       • Dependence on the router

8. Intranets

   • a private network used same technology as the internet

9. Extranets

   • intranet but allows other parties to access data

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