HTTP status codes
For every request issued by a web client (browser), the web server returns a three-figure HTTP status code. The code goes with a short description.
HTTP status codes are specified in RFC 2616 under the control of the World Wide Web Consortium (W3C). See www.w3.org/Protocols/rfc2616/rfc2616.html.
In This Appendix
Informational 1xx Successful 2xx Redirection 3xx Client Error 4xx Server Error 5xx
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