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Protocols
are the procedures by which the computers communicate with one another. The servers
and clients over the web must share a common language in order to communicate.
The
World Wide Web communicates with the computers through the HTTP protocol. The web
pages are displayed through HTML which tells the browser how to display the information
containing pictures and text.
Also many conversations between servers and clients
in the internet are done using HTTP. HTTP is nothing but the set of rules for how
files and other data can be shared among computers.
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HTTP has the following methods:
CONNECT: Asks to connect for tunneling.
DELETE: Deletes the resource at the requested URL.
GET: Just asks the server to find a resource and send it back.
HEAD: Asks only for the header part.
OPTIONS: Provides information about HTTP methods such as to which methods the thing at the requested URL can respond.
POST: Can send form data to the server besides making a request for the resource.
PUT: For placing the enclosed information in the requested URL.
TRACE: Asks for the loopback of request message and is generally used for troubleshooting.
Of these GET and POST are the two most common methods used.
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