Networks

Networks

1. Topology

   • Star Network
     • Advantages
       • If a cable breaks all the other computers will still be able top access the file server
       • Direct access to the file server means access is fast
     • Disadvantages
       • Expensive to install due to the amount of cable needed
       • If the file server fails all the computers are affected
   • Bus Network
     • Advantages
       • Easy to install.
       • Cheap to install, as it doesn’t require much cable
     • Disadvantages
       • If the main cable fails or gets damaged the whole network fails
       • Speed of data is slow
       • every workstation on the network "sees" all of the data on the network – this is a security risk
   • Ring Network
     • Disadvantages
       • If any computers or the network cable breaks, it can affect the whole network.
     • Advantages
       • Cheapest network to install
       • Data speed is quick as it travels in one direction

2. Advantages

   • You can share printers.
   • Site (software) licenses are likely to be cheaper than buying several standalone devices.
   • Files can easily be shared.
   • Security is good users cannot see other users files unlike on stand-alone machines.
   • Data is easily backed up.
   • Network computers can communicate with each other.

3. Disadvantages

   • Buying the network cabling and file servers can be expensive.
   • Managing a large network is complicted , requires training and a network manager usually needs to be employed.
   • If the file server breaks down the files on the server becomes inaccessible.
   • Viruses can spread through a network.
   • There is a danger of hacking, especially in WAN’s.

4. WAN

   • Wide Area Network
   • Is more than 2 LAN's connected over a large geographical area

5. LAN

   • Is a single network in a small geographical area
   • Local area Network