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  2. Fix issues with AOL Mail image challenges - AOL Help

    help.aol.com/articles/what-should-i-do-if-i-get...

    Before you attempt another image challenge, clear the cache on your web browser. If you're still prompted to retake the image challenge multiple times a day, you might have a more serious issue. Check out the Security Center for info about recommended antivirus software and reset your password to make sure it's secure.

  3. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/ReCAPTCHA

    In 2013, reCAPTCHA began implementing behavioral analysis of the browser's interactions to predict whether the user was a human or a bot. The following year, Google began to deploy a new reCAPTCHA API, featuring the "no CAPTCHA reCAPTCHA"—where users deemed to be of low risk only need to click a single checkbox to verify their identity. A ...

  4. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  5. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The client has asked for a portion of the file (byte serving), but the server cannot supply that portion. For example, if the client asked for a part of the file that lies beyond the end of the file. Called "Requested Range Not Satisfiable" previously. [16]: §10.4.17 417 Expectation Failed

  6. Anti-spam techniques - Wikipedia

    en.wikipedia.org/wiki/Anti-spam_techniques

    Various anti-spam techniques are used to prevent email spam (unsolicited bulk email).. No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) as opposed to not rejecting all spam email (false negatives) – and the associated costs in time, effort, and cost of wrongfully obstructing good mail.

  7. Cache invalidation - Wikipedia

    en.wikipedia.org/wiki/Cache_invalidation

    Cache invalidation is a process in a computer system whereby entries in a cache are replaced or removed.. It can be done explicitly, as part of a cache coherence protocol. In such a case, a processor changes a memory location and then invalidates the cached values of that memory location across the rest of the computer system.

  8. Online Copyright Infringement Liability Limitation Act

    en.wikipedia.org/wiki/Online_Copyright...

    Section 512(f) makes the sender of an invalid claim liable for the damages resulting from the content's improper removal, including legal fees, but that remedy is not always practical. Furthermore, ISPs tend to remove allegedly offending material immediately, while there is a 10- to 14-day delay before the ISP re-enables access in response to a ...

  9. Wikipedia:Village pump (technical)/Archive 216 - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Village_pump...

    But your account was created seven months earlier than Muboshgu's (21 April 2005 vs. 22 November 2005), and yet the creation date is visible on your contribs page. Then there are also Bearcat (created on 3 October 2003), BD2412 (20 February 2005), Koavf (5 March 2005), etc, which all were created before Muboshgu's account too, and yet have ...