HTTP Overview - HTTP

What is the overview of HTTP?

The Hypertext transfer Protocol (HTTP) is an application-degree protocol for allotted, collaborative, hypermedia records systems. This is the inspiration for facts conversation for the sector wide internet (i.e. internet) considering 1990. HTTP is a universal and stateless protocol which can be used for other purposes as well the usage of extensions of its request methods, mistakes codes, and headers.

Essentially, HTTP is a TCP/IP based totally communiqué protocol; this is used to supply facts (HTML files, photo documents, question results, and so on.) on the arena wide net. The default port is TCP eighty; however different ports can be used as well. It affords a standardized manner for computers to speak with every other. HTTP specification specifies how clients' request facts could be built and sent to the server, and the way the servers respond to those requests.

What are the features of HTTP?

There are three fundamental capabilities that make HTTP a simple however effective protocol:

  • HTTP is connectionless: The HTTP consumer, i.e., a browser initiates an HTTP request and after a request is made, the purchaser disconnects from the server and waits for a reaction. The server techniques the request and re-establishes the reference to the purchaser to send a reaction back.
  • HTTP is media unbiased: It means, any kind of information may be sent by HTTP so long as both the patron and the server realize a way to manage the records content material. It’s far required for the consumer as well as the server to specify the content material type using suitable MIME-type.
  • HTTP is stateless: As stated above, HTTP is connectionless and it's miles a direct end result of HTTP being a stateless protocol. The server and client are aware about every other only at some stage in a current request. Afterwards, both of them overlook about every other. Because of this nature of the protocol, neither the client nor the browser can retain statistics between special requests throughout the web pages.
  • HTTP/1.0 uses a new connection for each request/response exchange, where as HTTP/1.1 connection may be used for one or more request/response exchanges.

Basic Architecture

The following diagram shows a very basic architecture of a web application and depicts where HTTP sits:

http protocol

The HTTP protocol is a request/response protocol primarily based at the customer/server based totally architecture where web browsers, robots and search engines like google and yahoo, and many others act like HTTP customers, and the internet server acts as a server.

Client

The HTTP customer sends a request to the server in the form of a request technique, URI, and protocol model, followed by using a MIME-like message containing request modifiers, consumer information, and possible frame content material over a TCP/IP connection.

Server

The HTTP server responds with a standing line, such as the message's protocol version and an achievement or error code, followed by means of a MIME-like message containing server statistics, entity Meta data, and viable entity-body content.

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