Networks

Networks

1. Advantages

   • Hardware can be connected such as Printers on a network can be used by all computers connected to the internet
     • Software can be shared. A computer program may be installed on one computer but can run on other computers.
       • Data can be shared.
         • Files stored on a server allow for easier back-up schedules than if the files were stored on multiple computers.

2. Disadvantages

   • The cost of cabling and setting up can be high
     • A virus can spread quickly through a network infecting each computer.
       • Hackers may gain unauthorised access to files saved on a network server
         • Nertworks can fail to work properly - causing loss of access to data, hardware and software.

3. A file server

   • A file server has programs and data files stored on its backing strogae. it should have a large capacity hard disk.

4. A client server network

   • Is an organised network so that one computer acts as a server and all the other computers are clients that use the shared resources.

5. A peer to peer network

   • Is a network where all the computers arre equal in importance.

6. Bus network

   • Advantages
     • Easy to install
       • Cheap to install as it doesnt require that many cables.
   • Disadvantages
     • If the main cable fails or gets damaged teh whole network will fail.
       • As more workstations are connetced teh network will becomw slower because of data collisions.
         • Every workstaion on the network 'sees' all of the data on the network - this is a security risk.

7. Star network

   • Advantages
     • If one cable or device fails then all the others will continue to work, this makes it very reliable.
       • High performing as no data collisions will occur.
   • Disadvantages
     • Expensive to install as this type of network uses the most cable.
       • Extra hardware is required (hubs and switches.) which adds to the cost.
         • If the server fails all computers are affected.

8. Ring network

   • Advantages
     • This type of network can transfer data quickly because the data only flows in one driection so there wont be any data collisons.
       • Cheapest network to set up
   • Disadvantages
     • If the main cable fails or any device is faulty then the whole network will fail.

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