Post on 20-Jun-2015
transcript
Internet ServicesAlice A. AntwiAlice A. Antwi
Information and TechnologyInformation and Technology
3i3i
Internet ServicesInternet Services
The Internet is an International wide area network connecting thousands of computer networks situated in different countries.
Provision
• The Internet provides a variety of services:Email serviceNewsgroups or channels- Newsgroups
provide a ‘meeting place’ through the Internet, for people who share a common interest.
World Wide Web serviceFile Transfer Protocol (FTP) service
Did you know?
The Internet Service was started by the US military in 1969 with four computers. It grew and in the following 10 years it connected 200 computers in the military and educational establishments. By 1996, there were more than 50 million users connected to 4 million computers. The Internet service is available in about 170 countries.
• The most interesting service is the electronic-mail or email. It is cheaper and faster than postal services.
• Internet users can join as members of various newsgroups or channels. Newsgroups provide a ‘meeting place’, through the internet, for people who share a common interest.
Searching information on the web
• Finding information on the Web is really difficult. This is mainly because of its size.
• In order to help us search for information, the web has a number of search engines.
• A search engine is a website that allows users to search for keywords on web pages.
• Some of the search engines suitable for young children are: Yahooligans, Kids Click, AOL Kids etc.
Search Engines• A search engine is a website that A search engine is a website that
allows users to search for allows users to search for keywords on web pages.keywords on web pages.
• Some of the search engines Some of the search engines suitable for young children are: suitable for young children are: Yahooligans, Kids Click, AOL Kids Yahooligans, Kids Click, AOL Kids etc.etc.
Information access precautions
• Like in real-life situations, you will come across many people with different interests on the Internet. Here are some tips for you to follow when accessing the web information:
Never agree to get together with someone you have “met” online without first checking with your parents.
Never respond to any messages that are mean or in any way make you feel uncomfortable.
Never give out personal information such as your address, telephone number, or pictures without consent.
Publishing on the Web
Have you at anytime wondered how a homepage is created?
• Homepage creators use a simple programming language called HTML to do this. HTML stands for HyperText Markup Language.
• Using this is just like typing a document.
HTML• HTML files are just normal text files. HTML
documents have two parts which are the headings and the body. The body contains all other information you want to present on the web. All HTML files start with a <HTML> and end with </HTML> tag.
• An example of an html tag:
• Boldface tag. <B> Text to be boldfaced</B> Any text
in between these tags will be boldfaced.
Computers in the government sector
• In most countries, the government is the largest user of information technology. A number of government services such as billing, land survey, health care, payroll and population census are computerized.
• The main purposes of computerizing government operations are to improve efficiency, allow sharing of data between various departments and to plan and forecast services.
Computerizing population census
Computers in the private sector
• Many aspects of a business operation involve data processing. These include accounting, purchasing, inventory listing as well as profit and loss analysis.
• Almost all hotels in the country use computers for room reservation. It is now possible to reserve a room in any local hotels using the Internet from any part of the world.
Video Conferencing Equipment