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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    203 Non-Authoritative Information (since HTTP/1.1) The server is a transforming proxy (e.g. a Web accelerator) that received a 200 OK from its origin, but is returning a modified version of the origin's response. [1]: §15.3.4 [1]: §7.7 204 No Content The server successfully processed the request, and is not returning any content.

  3. Unreachable code - Wikipedia

    en.wikipedia.org/wiki/Unreachable_code

    In computer programming, unreachable code is part of the source code of a program which can never be executed because there exists no control flow path to the code from the rest of the program. [ 1 ] Unreachable code is sometimes also called dead code , [ 2 ] [ 3 ] although dead code may also refer to code that is executed but has no effect on ...

  4. errno.h - Wikipedia

    en.wikipedia.org/wiki/Errno.h

    Address family not supported by protocol EADDRINUSE: 98: Address already in use EADDRNOTAVAIL: 99: Cannot assign requested address ENETDOWN: 100: Network is down ENETUNREACH: 101: Network is unreachable ENETRESET: 102: Network dropped connection on reset ECONNABORTED: 103: Software caused connection abort ECONNRESET: 104: Connection reset by ...

  5. Black hole (networking) - Wikipedia

    en.wikipedia.org/wiki/Black_hole_(networking)

    For IPv6, the black hole prefix is 100:: / 64. [1] For IPv4, no black hole address is explicitly defined, however the reserved IP addresses can help achieve a similar effect. For example, 198.51.100.0 / 24 is reserved for use in documentation and examples [2]; while the RFC advises that the addresses in this range are not routed, this is not a ...

  6. List of SMTP server return codes - Wikipedia

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

    [1] The subjects are defined as follows: X.0.XXX Other or Undefined Status; X.1.XXX Addressing Status; X.2.XXX Mailbox Status; 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

  7. Google Public DNS - Wikipedia

    en.wikipedia.org/wiki/Google_Public_DNS

    Google Public DNS was announced on December 3, 2009, [1] in an effort described as "making the web faster and more secure." [2] [3] As of 2018, it is the largest public DNS service in the world, handling over a trillion queries per day. [4] Google Public DNS is not related to Google Cloud DNS, which is a DNS hosting service.

  8. Googol - Wikipedia

    en.wikipedia.org/wiki/Googol

    The decay time for a supermassive black hole of roughly 1 galaxy-mass (10 11 solar masses) due to Hawking radiation is on the order of 10 100 years. [7] Therefore, the heat death of an expanding universe is lower-bounded to occur at least one googol years in the future.

  9. List of FTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_FTP_server_return...

    Below is a list of all known return codes that may be issued by an FTP server. ... (long address, port). 229: ... Syntax error, command unrecognized and the requested ...