Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Searchable, convenient, complete TCP/IP information.
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Key Applications and Application Protocols
           9  TCP/IP File and Message Transfer Applications and Protocols (FTP, TFTP, Electronic Mail, USENET, HTTP/WWW, Gopher)
                9  TCP/IP World Wide Web (WWW, "The Web") and the Hypertext Transfer Protocol (HTTP)
                     9  TCP/IP Hypertext Transfer Protocol (HTTP)
                          9  HTTP Messages, Message Formats, Methods and Status Codes

Previous Topic/Section
HTTP Request Message Format
Previous Page
Pages in Current Topic/Section
1
2
3
Next Page
HTTP Methods
Next Topic/Section

HTTP Response Message Format
(Page 2 of 3)

Status Line

The status line—not “response line”, note—is the start line used for response messages. It has two functions: to tell the client what version of the protocol the server is using, and to communicate a summary of the results of processing the client's request. The formal syntax for the status line is:

<HTTP-VERSION> <status-code> <reason-phrase>
HTTP Version

The HTTP-VERSION label in the status line serves the same purpose as it does in the request line of a request message; here, it tells the client the version number that the server is using for its response. It uses the same format as in the request line, in upper case as “HTTP/0.9”, “HTTP/1.0” or “HTTP/1.1”. The server is required to return an HTTP version number that is no greater than that the client sent in its request.

Status Code and Reason Phrase

The status code and reason phrase provide information about the results of processing the client's request in two different forms. The status code is a three-digit number that indicates the formal result that the server is communicating to the client; it is intended for the client HTTP implementation to process so the software can take appropriate action. The reason phrase is an additional, descriptive text string, which can be displayed to the human user of the HTTP client so he or she can see how the server responded. I describe status codes and reason phrases later in this section, and also list all of the standard codes.


Previous Topic/Section
HTTP Request Message Format
Previous Page
Pages in Current Topic/Section
1
2
3
Next Page
HTTP Methods
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.