Network- The basics

Network- The basics

1. Computer Network?

   • Two or more computers
   • Linked together
   • Share resources

2. Shared resources

   • Hardware
     • Printers
   • Software
     • Word processer
     • Only installed onto one computer
   • Data
   • Internet connection

3. Peer to peer

   • Equal status on networks
   • Share resources
   • Small / home networks
   • Basic knowledge needed
   • More people = slower network

4. Client server

   • 1 computer , the server , stores data for networks
   • Programs stored on server
   • network dependant on server
   • Server goes down = everything goes down

5. LAN - Local are

   • Small area
   • Single buildings
   • cable. Wireles
   • owned by company
   • Cheap to build + run

6. Topologies

   • Ring
     • Advantages
       • Easy to add extra devices
       • Each has same access
     • Disadvantages
       • If one chain breaks it all breaks
       • Faults difficult to locate
   • Bus/Line
     • Advantages
       • All connected to back bone
       • Signals passed in either direction
     • Disadvantages
       • Cost effective
   • Star
     • Advantages
       • Fault tolerant
       • Load tolerant
       • Easy to add extras
     • Disadvantages
       • High cost
         • Expensive
       • Dependent on router

7. WAN- Wide are

   • Different buildings
   • Expensive

8. Intranet

   • Private network
   • Same technology as internet
   • Good for organisations

9. Extranet

   • Allows other parties

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