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  2. List of FTP server return codes - Wikipedia

    en.wikipedia.org/.../List_of_FTP_server_return_codes

    File status. 214: Help message. Explains how to use the server or the meaning of a particular non-standard command. This reply is useful only to the human user. 215: NAME system type. Where NAME is an official system name from the registry kept by IANA. 220: Service ready for new user. 221: Service closing control connection. Logged out if ...

  3. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    List of file signatures. This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers or Magic Bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The RFC specifies this code should be returned by teapots requested to brew coffee. [18] This HTTP status is used as an Easter egg in some websites, such as Google.com's "I'm a teapot" easter egg. [19] [20] [21] Sometimes, this status code is also used as a response to a blocked request, instead of the more appropriate 403 Forbidden. [22] [23]

  5. Hackers steal data on virtually all of AT&T’s wireless customers

    www.aol.com/finance/hackers-steal-data-virtually...

    Call and text message information was compromised. AT&T is reporting it was the victim of what is likely one of the largest data breaches of the year, as hackers obtained phone call and text ...

  6. Bad command or file name - Wikipedia

    en.wikipedia.org/wiki/Bad_command_or_file_name

    The topic of this article may not meet Wikipedia's general notability guideline. Please help to demonstrate the notability of the topic by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond a mere trivial mention.

  7. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    X.3.XXX Mail System Status. X.4.XXX Network and Routing Status. X.5.XXX Mail Delivery Protocol Status. X.6.XXX Message Content or Media Status. X.7.XXX Security or Policy Status. The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248 . A server capable of replying with an Enhanced Status ...

  8. Filename extension - Wikipedia

    en.wikipedia.org/wiki/Filename_extension

    A filename extension, file name extension or file extension is a suffix to the name of a computer file (for example, .txt, .docx, .md ). The extension indicates a characteristic of the file contents or its intended use. A filename extension is typically delimited from the rest of the filename with a full stop (period), but in some systems [ 1 ...

  9. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    1xx—Provisional Responses. 100 Trying. Extended search being performed may take a significant time so a forking proxy must send a 100 Trying response. [ 1]: §21.1.1. 180 Ringing. Destination user agent received INVITE, and is alerting user of call. [ 1]: §21.1.2. 181 Call is Being Forwarded.