It is an application layer (seventh) protocol. As we have already said, there are two parties involv in : the client and the server. The first is an application on the user’s device (usually a web browser). It creates an request and sends it to the server, where information about the site or service being search for is locat.
The software on the web server, in turn, processes this request and issues an response
It sends it back to the client, the browser interprets the data and displays it on the screen. Together, this is call an message. It occurs every time overseas chinese data you open a link, enter information into a form, etc. – basically, when data packets are transferr between the client and the server. The request is always sent by the client, the server only responds.
According to the standard, an request consists
Of three parts: the starting line, which specifies the parameters. Of the request and response; a header (there may be several of them) describing the service information; body (it may not exist at all), containing the transmitt data itself. Sometimes products for sale on Instagram stories a request may include only two lines. The start line and the mandatory Host header. The first is compos according to the formula Method + URI + Version . The method changes values depending on the purpose of the request (GET — get, POST — send, DELETE — delete, etc.
The URI Uniform Resource Identifier
Specifies the path to a specific web resource page (via a slash) or an asterisk if the request is address to the web server itself. At the end, the protocol buying house b and version us are written accordingly. The Host header is necessary because it contains the URL of the site, i.e. information about the location of the server. The response is built in roughly the same way.