Networks

Networks

1. LAN

   • Local Area network
     • E.G. Home Wifi

2. WAN

   • Wide area network
   • Several LANs connected together
   • E.G. The internet

3. Advantages of networks

   • Sharing devices saves money
   • sites (software) licenses are cheaper than buying several stand-alone licenses
   • security is good
   • Data is easy to back up

4. Disadvantages

   • Can be expensive
   • managing a large network is extremely complicated
   • Viruses
   • Hacking
     • E.G. PSN

5. Network types

   • Bus Network
     • all work stations servers are connected by one cable
       • Advantages
         • Easy to install. cheap to install as it doesn't require many cables
       • Disadvantages
         • If the main fails, then the network goes down
   • Ring Network
     • Each device is connected to the other devices. Each packet of data travels in one direction
       • Advantages
         • The types of data are transferred quickly.
       • Disadvantages
         • If the main cables fail then the whole network fails.
   • Star Network
     • Each device has its own cable connected to the hub
       • Advantages
         • Very reliable. If one cable fails, the network still works.
       • Disadvantages
         • Expensive to install this type of network.

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