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Networks

1. Advantages

   • Sharing devices such as printers saves money.
   • Files can easily be shared between users.
   • Data is easy to backup as all the data is stored on the file server.

2. Disadvantages

   • Data is easy to backup as all the data is stored on the file server.
   • Purchasing the network cabling and file servers can be expensive.
   • Viruses can spread to other computers throughout a computer network.

3. file server-In computing, a file server is a computer attached to a network that has the primary purpose of providing a location for shared disk access, i.e. shared storage of computer files

4. Different types of network

   • WAN
     • A LAN covers a small area such as one site or building, eg a school or a college.
   • The Internet is a WAN. A network of bank cash dispensers is a WAN. A school network is usually a LAN. LANs are often connected to WANs, for example a school network could be connected to the Internet. WANs can be connected together using the Internet, leased lines or satellite links.
   • LAN
     • A WAN covers a large geographical area. Most WANs are made from several LANs connected together.
   • Bus network
     • In a bus network all the workstations, servers and printers are joined to one cable (the bus). At each end of the cable a terminator is fitted to stop signals reflecting back down the bus.
   • Ring network
     • In a ring network each device (workstation, server, printer) is connected to two other devices, this forms a ring for the signals to travel around. Each packet of data on the network travels in one direction and each device receives each packet in turn until the destination device receives it.

5. components that make a network

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