Internet and World Wide Web
What is the Internet
A network is a collection of computers interconnected through some physical medium so that they can communicate.The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP). It is a network of networks that consists of millions of private and public, academic, business, and government networks of local to global scope that are linked by a broad array of electronic and optical networking technologies.
World Wide Web
The World Wide Web, abbreviated as WWW and commonly known as The Web, is a system of interlinked hypertext documents contained on the Internet. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia and navigate between them by using hyperlinks.Web Browser
A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI) and may be a web page, image, video, or other piece of content. Hyperlinks present in resources enable users to easily navigate their browsers to related resources.Web Page
A webpage or web page is a document or resource of information that is suitable for the World Wide Web and can be accessed through a web browser and displayed on a computer screen.
This information is usually in HTML or XHTML format, and may provide navigation to other webpages via hypertext links.
Webpages may be retrieved from a local computer or from a remote web server. The web server may restrict access only to a private network, e.g. a corporate intranet, or it may publish pages on the World Wide Web. Webpages are requested and served from web servers using Hypertext Transfer Protocol (HTTP).
This information is usually in HTML or XHTML format, and may provide navigation to other webpages via hypertext links.
Webpages may be retrieved from a local computer or from a remote web server. The web server may restrict access only to a private network, e.g. a corporate intranet, or it may publish pages on the World Wide Web. Webpages are requested and served from web servers using Hypertext Transfer Protocol (HTTP).
IP Address
What is an IP Address?
An IP Address is unique number assigned to a computer is known as the Internet Protocol (IP) address. In computer networking, this unique address is used by devices in order to identify and communicate with each other on a network utilizing the Internet Protocol standard (IP).Domain names are used instead of IP addresses so it should first and foremost fulfill the purpose of the IP address and that it should uniquely identify a particular computer on the Internet. As you can see a simple and short name would not certainly do the job so domain names consist of several parts separated by periods just like the IP address.
The format of the Domain name is,
hostname.subdomain.top-level-domain
Every domain name ends in a top level domain(TLD) name, which is always either one of a small list of generic names (three or more characters), or a two characters territory code based on ISO-3166 . Top-level domains are sometimes also called firstlevel domains. Some of the examples for Top-level domains(TLDs) are .edu - educational .com - commercial .gov - government .mil - military .net - network support centers .org - other organizations.
Ex: www.studyeasyphp.blogspot.com www - is host name, studyeasyphp.blogspot is subdomain, .com is top-level-domain
Example for Top Level Domain
- .gov - Government agencies
- .edu - Educational institutions
- .org - Organizations (nonprofit)
- .mil - Military
- .com - commercial business
- .net - Network organizations
- .lk - Sri Lanka