• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Networks LAN = Local Area Network.

Extracts from this document...


Networks LAN = Local Area Network. When PCs close to one another in a single office or building are joined by a cable, a network is formed known as a Local Area Network (LAN). Once the computers are connected together into a LAN, many people (users) can share and use the same resources at the same time. They can share files, software, hard disks and peripherals such as a printer or CD-ROM. Users can also use the LAN to communicate with each other by e-mail. Data can be transmitted very quickly between networked computers. Advantages of Networks * Programs can be shared- software packages can be installed onto the file server and accessed by all individual workstations at the same time. ...read more.


The only other person who can access these files is the 'system administrator' who looks after the network. Disadvantages of Networks * Networks can be expensive to set up. They often involve taking up floors and ceilings to lay hundreds of metres of cables. * The File Server needs to be a powerful computer, which often means that it is expensive. * Networks are vulnerable to security problems. Hackers, disgruntled employees or even competitors might try to break into the system to read or damage crucial information. Much effort is spent preventing unauthorised access to data and software. * If the main File Server breaks down, then the whole system becomes useless and no-one can carry on working. ...read more.


Disadvantage If a single machine is switched off then the network does not work. If the cable breaks, once again, the network does not work. Bus This is the simplest way to connect workstations, servers and other components of a network by using a single cable. One or more of the workstations act as the File Server, whilst the other machines are used as workstations or terminals. Advantage Easy to install Very cheap Disadvantage If many workstations are using the network at the same time, response can be very slow, thus frustrating users who want to work quickly. The technical term for data trying to travel simultaneously along the cable in different directions is called 'data collision'. A busy network will have many data collisions. If there is a problem with the cable, the entire network stops working. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Communications section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Communications essays

  1. ICT Systems in Everyday Life: Your Local Community

    to time, like when there was a live deer loose in the town centre. Public CCTV surveillance is an increasing feature of our daily lives. Its deployment is commonplace in a variety of areas to which members of the public have free access.

  2. special needs

    Maria wouldn't need to travel to different destinations to visit her family members and if she decides to it will be intricate for her, she can video conference which is a very real and easy experience as she can see her family members and her family members can see her as if they were actually visible in sight.

  1. Free essay

    Impact of ICT in Community

    Hal also offers quick navigation keys, full spelling and attribute announcement, easy form filling, focus tracking and much more. Hal is designed to meet the ever changing needs of today's IT environment for blind people like Marry. Accordingly, Hal does not alter either the operating system or application software in any way.

  2. Shareware and Its Network Security

    Knopf - encouraged the copying of his programs, which actually bought him new business as the consumers were more eager to pay for a "service" that was cheaper than go to stores and may hefty sums to buy software they quite possibly have never used.

  1. Bookshop Manager

    In this case, it is to do with contacting their customers, and knowing addresses for deliveries. All of the names of these people are stored on the computer that they have, and it has their addresses and other information. This data is private, and the shop cannot give this data

  2. Unit 23: Investigating Communications and Networks

    Below is a diagram shown of a Client Server network. 2. Details of the relative advantages and disadvantages of the following topologies: Star - All devices are connected to a central hub. Nodes communicate across the network by passing data through the hub.

  1. Information Security.

    The bad guys who are trying to do something with the system which the designers would like to avoid will be called the enemy' 11 their activities will be called 'attacking' the system. The advance of information technology has sparked off a public debate on the Subject of individual privacy.

  2. Discuss the factors determining network specification for a small business.

    Because the two wires have opposite magnetic fields, they cancel each other out. The twisting of the wires is a 'self-shielding' method, which makes the wires less susceptible to noise. Unlike STP, UTP does not have extra shielding, and therefore relies solely on the cancellation effect to reduce noise and limit signal degradation cause by electromagnetic and radio frequency interference.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work