Friday, 13 April 2012

Java interview questions: - Which other protocol is also called as stateless protocol?

A protocol is stateless if it can remember difference between one client request and the other. HTTP is a stateless protocol because each request is executed independently without any knowledge of the requests that came before it.

Figure: - HTTP Protocol in action

Above is a pictorial presentation of how a stateless protocol operates. User first sends “request1” and server responds with “response1”. When the same user comes back with “request2” server treats this as new user and has no idea that it’s the same user who has come with the request. In short every request is a new request for the HTTP protocol so it’s called as a stateless protocol.

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