Concept of Internet
The Internet is a global system of interconnected computer networks that use the standard Internet
protocol suite (TCP/IP) to link several billion devices worldwide. It is a network of networks that consists
millions of private, public, academic, business, and government networks, of local to global scope, that are
linked by a broad array of electronic, wireless, and optical networking technologies. The Internet carries
extensive range of information resources and services, such as the inter-linked hypertext documents and
applications of the World Wide Web (WWW), the infrastructure to support email, and peer-to-peer
networks for file sharing and telephony.
What is an Internet Application?
Simply put, an Internet application is an interactive, compiled application that can be accessed through a
corporate or through the . Internet applications can perform complex business processes on either the
client or the server. In a server-based Internet application, the application uses the Internet protocol to
receive requests from a client, typically a Web browser, process associated code, and return data to the
In Visual Basic Internet programming, you can add active content to Web pages with little effort. Visual
Basic Internet applications link Visual Basic code to one or more HTML pages and handle events raised
those pages by interacting with programs on either a client or a server. There are two types of Internet
applications in Visual Basic: server-based IIS applications and client-based DHTML applications.\
The user interface in a Visual Basic Internet application can be a series of HTML pages, a mix of HTML
pages and Visual Basic forms, or a Visual Basic form that makes use of special components such as the
Web Browser control to take advantage of some of the power of the Internet. Regardless of the type of
user interface, the application handles events, calls methods, and sets and retrieves properties based on
elements in the HTML page.
c.Service on Internet
www and websites
world wide web (www)
The world wide web is a set of many thousands of computers that are connected to the internet and
serving web pages. These computers are usually controlled by a hosting company but in some cases can
also be a personal server or business server that has web server software running.
A web server is the actual computer that is set up to serve web pages to the world through the internet.
This takes a very fast internet connection because of the possibility of hundreds of people using the server
and posted web sites at any given time.
A website is a group of web pages that have information in the various pages that contain similar subject
materials. For instance, the web site would have a name (subject) such as GoodFords.com and have
several pages related to good Ford vehicles. The website has a main web page commonly called the
Homepage (index.html or default.html). The site's address will display the homepage and you can click on
hyperlinks to go to other pages on the website.
A webpage is a text page written in a form of HTML (hyper text markup language) that contains text, links
or tags that will display graphics, audio, video, downloadable files and of course other web pages. A web
page is a page containing information on a subject. As in the above example, a page could be on Ford
Mustangs, and another page in the same website, pertaining to Ford Thunderbirds and on and on.
A web browser (Microsoft's Internet explorer or Mozilla's Firefox for example) is a program that
the code that makes up a webpage (HTML) into a form that we can recognize.
A hyper link is usually shown as a blue underlined term on a web page that equates to another web page
on the same website or another related website.