Partner Link

Cheap Mobile Phones
- Cheap Mobile Phones - Best Mobile Phone Deals, Laptops, Sat Nav Devices, Cordless Phones, Internet Phones, Broadband Internet Deals from leading retailers of UK. Choose Products and Compare Prices for best deals.


Mobile Phones
- Offers mobile phones on contract, pay as you go, sim free deals with free gifts. We compare latest phone deals from leading retailers of UK.

. ||

Custom logo design
Get your company a logo design. Professional logo designs by expert logo designers. Call 0208 133 2514 for custom logo design packages.


Top Site

Flyer Printing Flyer Printing – Print your flyers on latest design. We offer cheap flyer printing services in all over UK. Full color flyer printing & art work in your own budget. Order for online flyer printing from your home.
Mobile Broadband Deals  Mobile Broadband - Buy Mobile Broadband Deals, Best Mobile Internet Offers With Free Line Rental, USB Modem and Cheapest Network Connection Offers from 3 Mobile in UK
Mobile Upgrades Upgrade Mobile Phone Deals – upgrade your mobile phones from o2, orange, virgin, vodafone, t-mobile and all Manufacturers Nokia, Samsung, Sony Ericsson, LG ,Blackberry and Motorola. Mobile Broadband Deals Mobile Broadband - Buy Mobile Broadband Deals, Best Mobile Internet Offers With Free Line Rental, USB Modem and Cheapest Network Connection Offers from 3 Mobile in UK.


“Data Communication is the exchange of Information from one entity to the other
using a Transmission Medium”.

As you can clearly notice, the definition of Data Communication although Simple
leaves many questions unanswered:

  • Exchange??????
  • Information?????
  • Entities???????
  • Transmission????
  • Medium????
We will try to answer all these Questions in this Course

History of Data Communication
Data communications history represents a blend of histories, including:
  • The history of the telecommunications industry
  • The history of data communications, and
  • The history of the Internet
  • Telegraph 1837 Samuel Morse
Telegraph 1837 Samuel Morse
Modern telecommunication industry began in 1837 with the invention of
the telegraph by Samuel Morse
This led to building a telecommunications infrastructure of poles and
wires as well as to the development of communication hardware and

Telephone 1876 Alexander Graham Bell
Invention of telephone by Alexander Graham Bell in 1876 and the
development of wireless communication technology by Guglielmo
Marconi in the 1890s set the stage for today’s communication industry

By 1950’s
By 1950s, telephone and telegraph companies had developed a network of
communication facilities throughout the industrialized world

Although development of databases, languages, operating systems, and
hardware was strong from 1950s to 1970s, large-scale data communication
systems did not emerge until the 1970s.

This was stimulated by 3 major developments:

  • Large-scale integration of circuits reduced cost and size of terminals and communication equipment
  • New software systems that facilitated the development of data communication networks
  • Competition among providers of transmission facilities reduced the cost of data circuits


SEO Delhi said...

It’s having very nice information. It is showing great creativity. I have spent a long time to find such post. All aspects of this post are perfect. It’s nice experience to read it.

Post a Comment

Thanks for interest it