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.
FTP Replies, Reply Code Format and Important Reply Codes
(Page 3 of 5)
Combining Digit Values to Make Specific Reply Codes
These x, y
and z digit meanings are combined to make specific reply
codes. For example, consider reply code 530, diagrammed
in Figure 292.
The first digit tells you that this is a permanent negative reply; the
second indicates that it is related to login or accounting. (It is in
fact an error message received when a login fails.)
Figure 292: FTP Reply Code Format
This diagram shows how the three-digit FTP reply code format is interpreted. In this example, reply code 530, the 5 indicates a permanent error, the 3 specifies that the error is related to authentication or accounting, and the 0 is the specific error type. A similar method is used for reply codes in many other TCP/IP application protocols, including SMTP and HTTP.
reply codes allows the code itself to immediately communicate information,
and provides a way of keeping different types of responses organized.
The idea described above was adapted for use by several other application
protocols, including SMTP for e-mail, NNTP for network news and HTTP
for the World Wide Web.
|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!|
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.