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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  3. List of websites blocked in mainland China - Wikipedia

    en.wikipedia.org/wiki/List_of_websites_blocked...

    Website Domain URL Category Primary language Duration of blockage Current status Google: google.com: www.google.com drive.google.com chat.google.com scholar.google.com

  4. Unreachable code - Wikipedia

    en.wikipedia.org/wiki/Unreachable_code

    As a consequence, err will hold the status of the SHA1 update operation, and signature verification will never fail. [5] Here, the unreachable code is the call to the final function. [6] Applying the Clang compiler with the option -Weverything includes unreachable code analysis, which would trigger an alarm for this code. [6]

  5. Find delivery delays or identify the sender in AOL Mail

    help.aol.com/articles/use-full-headers-to-find...

    An email’s full headers include info about how it was routed and delivered and the true sender of the email. View the full headers to find out where an email was delayed or if the real sender disguised their email address. View the full header of an email. 1. Click an email to open it. 2. Click the More drop-down in the top menu. 3.

  6. Black hole (networking) - Wikipedia

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

    The most common form of black hole is simply an IP address that specifies a host machine that is not running or an address to which no host has been assigned.. Even though TCP/IP provides a means of communicating the delivery failure back to the sender via ICMP, traffic destined for such addresses is often just dropped.

  7. Mgm/Kobal/Shutterstock; Mary Evans/AF Archive/Courtesy Everett (2); Silver Screen Collection/Hulton Archive/Getty . From top left to bottom right: Frank Morgan, Billie Burke, Margaret Hamilton ...

  8. 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.

  9. Restore deleted or missing contacts in AOL Mail

    help.aol.com/articles/restore-deleted-or-missing...

    If you've deleted your contacts or are suddenly missing some, don't worry! Contacts can be restored to automatic save points in time. WARNING: The restore will replace any changes or additions made to your contacts since that time.