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  2. Fix sending and receiving issues with third-party email apps

    help.aol.com/articles/cant-send-or-receive-email...

    If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem. Troubleshoot any problems with your account

  3. Authentication protocol - Wikipedia

    en.wikipedia.org/wiki/Authentication_protocol

    Stealing someone's identity is easy in the computing world - special verification methods had to be invented to find out whether the person/computer requesting data is really who he says he is. [2] The task of the authentication protocol is to specify the exact series of steps needed for execution of the authentication.

  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. Basic access authentication - Wikipedia

    en.wikipedia.org/wiki/Basic_access_authentication

    In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic <credentials> , where <credentials> is the Base64 encoding of ID ...

  6. Authentication - Wikipedia

    en.wikipedia.org/wiki/Authentication

    A network administrator can give a user a password, or provide the user with a key card or other access devices to allow system access. In this case, authenticity is implied but not guaranteed. Consumer goods such as pharmaceuticals, [ 7 ] perfume, and clothing can use all forms of authentication to prevent counterfeit goods from taking ...

  7. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    [2] [failed verification] Modern smartphones are used both for receiving email and SMS. So if the phone is lost or stolen and is not protected by a password or biometric, all accounts for which the email is the key can be hacked as the phone can receive the second factor. Mobile carriers may charge the user messaging fees.

  8. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    rmiactivation, Java remote method invocation (RMI) activation 1099: Yes: Assigned: rmiregistry, Java remote method invocation (RMI) registry 1100: Unofficial: SaltoSystems - Handshake for IP-Components 1112: Unofficial ESET virus updates [128] 1113: Assigned [note 2] [129] Yes [130] Licklider Transmission Protocol (LTP) delay tolerant ...