Networks

Networks

1. Types

   • LAN
   • WAN
     • 2 or more LANs

2. Advantages

   • Sharing devices (eg. Printers)
   • Easy file sharing

3. Disadvantages

   • Everything linked so viruses can spread quickly

4. Topology

   • The way computers are connected to a network
   • Bus
     • All computers and servers joined to one cable (The Bus)
     • Disadvantages
       • More things connected the slower it goes
       • If Bus fails, network fails
       • Data collisions
   • Ring
     • Infermation travels in oe direction from computer to computer
     • Advantages
       • No data collisions
       • Always quick whatever size
     • Disadvantages
       • If one device fails the whole network fails
   • Star
     • Each device has its own cable to the hub or switch
       • Hub sends data to every device
       • Switch sends data to one device
     • Disadvantages
       • Uses lots of cable
       • Expensive

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