Wednesday, August 28, 2013
Monday, August 26, 2013
WHAT IS INTERNET
The internet, sometimes simply called
“the Net” is a worldwide system of computer networks- a network of networks in
which users at any one computer can, if they have permission, get information
from any other computer (and sometimes talk directly to users at other computer). It was conceived by the
Advanced Research Projects Agency (ARPA) of the U.S Government in 1969 and was
first known an ARPANET. The original aim
was to create a network that would allow users of a research computer
at one university to be able to talk to” research computer at other
Universities. A side benefit of ARPANET’s design was that, because massage
could be routed or rerouted in more than one direction, the network could
continue to function even if parts of it were destroyed in the event of a military
attack or other disaster. Today, the internet is a public, cooperative,
and self-sustaining facility accessible to hundreds of millions of people
worlwide. Physically, the internet uses a portion of total resources of the
currently existing public telecommunication networks. Technically, what
distinguishes the internet its use of a set of protocols called TCP/IP
(Transmission Control Protocol/Internet Protocol). Two recent adaptations of
internet technology, the inranet and the extranet, also make use of the TCP/IP
protocol. For many internet users, eletronic mail has pratically replaced the postal service
for short written transactions. Electronic mail is the most widely used
application on the Net. You can also carry out live conversations with other
computer users, using Internet Relay Chat (IRC). More recently, internet
telephony hardware and software allow real-time voice conversations. The most
widely use of internet is Worl Wide Web (www). Its outstanding feature is hypertext,
a method of nistant cross-referencing. In most we site, cetain word or phrases
appear in text of a different color than the rest; oftten this text is also
underlined. When you select one of these words or phrases, you will be
transferred to the site or page that is relevant to this word or phrases. Sometimes there are buttons, images, or
portions of image that are “clickable.”
If you move the pointer over a spot on a web site and the pointer changes into
a hand, this indicates that you can click and be transferred to another site.
Using the web, you have access to millioms of pages of information. Web
browsing is done with web browser, the most popular of wich are Microsoft
Internet Explore and Netscape Navigator. The appearance of a particular web site
may vary slightly depending on the browser you use. Also later versions of a
particular browser are able to render more bells and whistles such as
animation, virtual reality, sound, and music files, than earlier version.Sunday, August 18, 2013
History of GSM in Nigeria
ABOUT GSM
GSM was fully approved in Nigeria in the year 2000 0n 27th August. During the 90s analogue cellular telephone system were experiencing rapid growth in Europe, particularly in Scandinavia and the United Kingdom, but also in France and Germany. Each country developed its own system which was incompatible with everyone else in equipment and operation. It was an undesirable situation because the mobile equipment became limited to operation within National boundaries, which in unified Europe were increasingly unimportant, but there was also a very limited market for each type of equipment, so economics of scale and the subsequent saving could not be realized. The Europeans realized this earlier on and in 1982 the conference of European post and Telegraphs(CEPT) formed a study group called the group GSM to study and develop a pan-European public and mobile system had to meet certain criteria's; they really worked hard. Searching for
- Mobile high quality subjective way of search
- Low terminal and service cost
- Support for international roaming
- Ability to support handheld terminals
- ISDN compatibility
Through the power of God, the mission of these great heroes was accomplished having done it one love they agreed to let it go round the world. So in 1989, GSM responsibility was transfer to European Telecommunication Standard Institute(ETSI) and GSM was redefined as Global System for Mobile Communication. Specifically in 1890 the phase 1 of GSM came up with publishing commercial services. Then from 1991-1993 they were only 36 GSM network in 22 countries around the world, but standardized in Europe. It kept increasing as days pass by, then from 1994-1999 over 1,100 GSM networks existed word wide. In Africa, mostly the west African counties, the use of GSM started 1997.
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