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

In this chapter we'll look at some of the important developments in communications.

Extracts from this document...


1. Introduction. The late 20th century has become known as the 'information age'. It would be impossible to conduct modern day businesses without the use of communication technologies such as the telephone, fax machine and computer communications networks. Communications and computer technology have become inextricably linked, resulting in telecommunications, the transmission of data of all kinds (text, graphics, sound and video) over a variety of different communication channels such as public telephone lines, private cables, microwave and satellite. In this chapter we'll look at some of the important developments in communications. 2. The Internet The Internet is the largest wide area network in the world. In fact it is not a single network, but a collection of thousands of computer networks throughout the world. These linked networks are of two types: * LAN (Local Area Network), covering an office block or University campus, for example; * WAN (Wide Area Network) connecting computers over a wide geographical area, even over several countries. All LAN and some WANs are owned by individual organisations. Some WANs act as service providers, and members of the public or businesses can join these networks for a monthly charge. There is no central authority or governing body running the Internet; it started with an initial 4 computers in 1969 and grew over the next ten years to connect 2000 computers in military and research establishments in the US. ...read more.


A Modem (Modulator/Demodulator) converts the data from your computer from digital form (0s and 1s) into analogue or waveform so that it can be sent over the telephone line, which was originally designed for speech. Modems typically transmit data at rates of between 28,800 bps (bits per second) and 56,600bps. A second modem at the receiving end translates the analogue signal back into digital form. Many computers come equipped with an internal modem card in one of the free expansion slots inside the computer. (Most PCs have four to eight expansion slots into which you plug a variety of peripheral devices.) In the near future you will be able to access the Internet, send e-mails and order your shopping online using a mobile phone, as described below. 11. Software and services required to access the Internet To connect to the Internet you need to sign up with an Internet Service Provider (ISP) who will supply you with a user account on a host computer and a complete software package that includes: * A browser which enables you to download and view pages from the World Wide Web; * Communications software which allows your computer to transmit and receive data using the Internet TCP/IP communications protocol; * An e-mail package to enable you to send and receive e-mails; * A newsreader which you use to read and post messages to the User-net groups; * An FTP client, which you use to download and upload files and software. ...read more.


(4) 2 A large company has introduced a communication system, which includes electronic mail. This system will be used for both internal use within the company and for external links to other organisations. a) Describe two features of an electronic mail system, which may encourage its use for internal communication between colleagues. (2) b) Contrast the use of an electronic mail system with each of fax and the telephone. (6) c) Describe two functions the communication system might have, other than the creation and reception of messages. (4) 3 A company specialises in organising international conferences for doctors. The company has decided to make use of the Internet for advertising and organising the conferences, a) State, with reasons, the hardware that the company would need, in addition to their PC and printer, in order to connect to the Internet. (4) b) State the purpose of the following software when used for the Internet: i) Browser ii) Editor iii) E-mail software c) Explain three potential advantages for this company of using the Internet as opposed to conventional mail/telephone systems. 4 Facsimile and computer based electronic mailing systems are different forms of message systems. a) For each of these systems, describe two of the facilities offered. (4) b) Discuss the relative strengths and weaknesses of each of these systems. (10) Chapter 6 - Role of Communication Systems Section 1 - Information: Nature, Role and Content Rai Karra Page 1 4/20/2007 ...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. Which properties of HTTP waste bandwidth? What is the additional problem using HTTP/1.0 together ...

    Network Layer - this layer is responsible for routing packets through a network or establishing a connection between two entities over many other intermediate systems. Important topics are addressing, routing, device location, and handover between different networks. ? Transport Layer - this layer is used to establish an end-to-end connection.

  2. OCR GCSE Business & Communication Task 7 Report

    are checked by my firewall to ensure I have accepted the authority for the information to enter my system. Any unwanted files are simply blocked and returned by the firewall. Another protection capability is the advantage of having a data encryption system.

  1. ICT Systems in Everyday Life: Your Local Community

    More importantly, it is this division in quality that has made viable the staggered release windows that are unique to the distribution of motion picture. By release windows, I refer to the timing of when movies are released on the various media available.

  2. Nokia Communications - Internal Communications.

    They are two communication used in external communication and they are: * Advertising * Internet Internet This is a quick useful way to communicate with the customers because Nokia can put as much as they want they can even put pictures that explain the financial details like a graph to

  1. Digital communications

    Council for Curriculum, Education and Assessment The name of the organisation that owns the site. The organisation is called the Council for Curriculum, Education and Assessment. org. Organisation The type of organisation that owns the site. org indicates that is a non-profit making organisation.

  2. Report On Satellite Communications

    For instance, The Earth orbits around the sun and is a satellite of the sun and the moon orbits around globe and is a satellite of earth. Other examples of obviously occurring satellites include asteroids, comets, stars, and other planets.

  1. Free essay

    information age

    Doesn't take that long to reply back either. While your on internet you can download music and video for your phone to listen and download games and the latest ring tones as well. The latest screen touch phone with free WI-Fi is iphone, provides you with everything even you tube.

  2. special needs

    Additionally, without her electronic wheelchair, she won't be able to work ideally in her workplace as she cannot work and her movements are unable to occur and thus she will have an unpleasant feeling of herself. Her wheelchair is extremely crucial in her life and without her wheelchair; it will

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