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Before the web page is displayed in your browser, the web server sends the HTTP header, which contains the status code. For a normal web page, the status is 200 OK. You do not see this because the server proceeds to send you the contents of the page. Web servers generate error messages when they encounter unexpected conditions. The most common of these is the 404 error. This error occurs whenever a user requests a nonexistent page. The page may have been moved, or the user may have mistyped the URL. Every request to your site is recorded in log files. See error code definitions given below:

100 — Continue
101 — Switching Protocols
200 — OK
201 — Created
202 — Accepted
203 — Non-Authoritative Information
204 — No Content
205 — Reset Content
206 — Partial Content
300 — Multiple Choices
301 — Moved Permanently
302 — Found
303 — See Other
304 — Not Modified
305 — Use Proxy
307 — Temporary Redirect
400 — Bad Request
401 — Unauthorized
402 — Payment Required
403 — Forbidden
404 — Not Found
405 — Method Not Allowed
406 — Not Acceptable
407 — Proxy Authentication Required
408 — Request Timeout
409 — Conflict
410 — Gone
411 — Length Required
412 — Precondition Failed
413 — Request Entity Too Large
414 — Request-URI Too Large
415 — Unsupported Media Type
416 — Request Range Not Satisfiable
417 — Expectation Failed

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