Head First Servlets and JSP, 2nd Edition

Anatomy of an HTTP response, and what the heck is a “MIME type”?

Now that we’ve seen the requests from the browser to the server, let’s look at what the server sends back in response. An HTTP response has both a header and a body. The header info tells the browser about the protocol being used, whether the request was successful, and what kind of content is included in the body. The body contains the contents (for example, HTML) for the browser to display.