Servlet headers

[Nila dhan]

Though this might be an elementary question, i would like to know what the request and response headers are and the purpose of them

[Pradeep bhatt]

The header could info about the browser, its version, the Locale info, cookies.

[William Brogden]

You should locate the documentation for the HTTP protocol, which if I remember correctly is called RFC2616. Here is the first thing that pops up in Google when searching for "RFC2616" - it defines exactly what the standard headers are and how they are used.
The servlet container does all the work of parsing the request headers and creating the response headers for you.
Bill