What are Search engines, Browsers and Web Servers?

Web Search engines

A web search engine is a program that is designed to search for information on the World Wide Web. Specified keywords are used to search for information in a search engine. The search results are generally presented in a list of results. These are called search engine result pages or SERP. The information may be a mix of web pages, images, and other types of files. Some search engines also present data available in databases or open directories. Search engines are a general class of programs that functions in various devices. The most widely used search engines are Google, Yahoo, Bing, Ask.com, etc.

Web Browsers

A web browser is commonly called a browser. It is a software application to locate, retrieve and display information on World Wide Web. Information includes web pages, or any other digital elements like video, images, audio and other files. On a web browser information is identified using a uniform resource locator or URL. A web browser is also used for accessing information on web servers and private networks and files in the system. The major web browsers are Mozilla Firefox, Google chrome, Internet Explorer, Opera and Safari.

Web Servers

A Web server is a program that, using the client/server model and the World Wide Web’s Hypertext Transfer Protocol (HTTP), serves the files that form Web pages to Web users. Web servers are computers that deliver Web pages. Every computer on the Internet that contains a Web site must have a Web server program. Every Web server has an IP address and possibly a domain name. Any computer can be turned into a Web server by installing server software and connecting the machine to the Internet. There are many Web server software applications, including public domain software from NCSA and Apache, and commercial packages from Microsoft, Netscape and others. Two leading Web servers are Apache, the most widely-installed Web server, and Microsoft’s Internet Information Server (IIS).