Protocol are present in each Protocol has different functions.

• HTTP (Hyper Text Transfer Protocol)
• POP3 (Post Office Protocol 3).
• SMTP (Simple Mail Transfer Protocol).
• FTP (File Transfer Protocol).
• IP (Internet Protocol).
• DHCP (Dynamic Host Configuration Protocol).
• IMAP (Internet Message Access Protocol).

Hypertext Transfer Protocol (HTTP) is a communications protocol for exchanging information over the Internet. The main document and then use the text in several dimensions, leading to connections with the World Wide Web. 

HTTP is a joint development by the World Wide Web Consortium (W3C) and Internet Engineering Task Force (IETF) issued by the RFC document series is an important piece of document is RFC 2616 (June 2542 year, a requirement of HTTP/1.1. models widely used today.

Is a standard HTTP request and response between a network user’s destination. With a host of web servers. Program in the network will create a HTTP request is called a user agent such as web browsers, web or wait basis, Le. The host of the HTTP response is called the origin server, which have the resources. Contained in HTML or image files such as between a user agent to origin server may have several types of medium such as Gateway, with waist emphasis, HTTP or capital that is not limited to contact over TCP / IP even if only a very popular event. possible. Fact is can be used on HTTP protocol network, any HTTP only expect that the communication is reliable. Therefore protocol. A certificate can be used. 

Normal network will begin creating HTTP requests. The open connections Transmission Control Protocol (TCP) to a specific port of a host (port 80 is the default) will host open HTTP requests to receive the message network. When the host receives a request. Will answer with a status message, for example “HTTP/1.1 200 OK”, followed by its own content delivery. Content that may be requested files. Error message. Information or otherwise. 

Why choose to use HTTP rather than UDP because TCP will send data through the web page are for TCP and one a control data transmission to follow the order. A correction to the error. 

Resources will be accessed by HTTP are identified using Uniform Resource Identifier (URI) (or is specific to the URL) using the http:, or https: a scheme.