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  2. Acknowledgement (data networks) - Wikipedia

    en.wikipedia.org/wiki/Acknowledgement_(data...

    The acknowledgement function is used in the automatic repeat request (ARQ) function. Acknowledgement frames are numbered in coordination with the frames that have been received and then sent to the transmitter. This allows the transmitter to avoid overflow or underrun at the receiver, and to become aware of any missed frames.

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The request has been fulfilled, resulting in the creation of a new resource. [6] 202 Accepted The request has been accepted for processing, but the processing has not been completed. The request might or might not be eventually acted upon, and may be disallowed when processing occurs. 203 Non-Authoritative Information (since HTTP/1.1)

  4. Automatic repeat request - Wikipedia

    en.wikipedia.org/wiki/Automatic_repeat_request

    Automatic repeat request (ARQ), also known as automatic repeat query, is an error-control method for data transmission that uses acknowledgements (messages sent by the receiver indicating that it has correctly received a message) and timeouts (specified periods of time allowed to elapse before an acknowledgment is to be received) to achieve ...

  5. Piggybacking (data transmission) - Wikipedia

    en.wikipedia.org/wiki/Piggybacking_(data...

    The sender also adds a counter (emitter timeout). If the counter ends without receiving confirmation, the sender assumes packet loss, and sends the frame again. Piggybacking introduces a complication not present with separate acknowledgements. How long should the data link layer wait for a packet onto which to piggyback the acknowledgement?

  6. Retransmission (data networks) - Wikipedia

    en.wikipedia.org/wiki/Retransmission_(data_networks)

    Retransmission, essentially identical with automatic repeat request (ARQ), is the resending of packets which have been either damaged or lost. Retransmission is one of the basic mechanisms used by protocols operating over a packet switched computer network to provide reliable communication (such as that provided by a reliable byte stream, for example TCP).

  7. Fix problems reading or receiving AOL Mail

    help.aol.com/articles/fix-problems-reading-or...

    If possible, ask the sender to resend the message to see if you can get the message a second time. Check for emails in your Spam folder. If you find emails in your Spam folder that don't belong there, you'll need to mark the messages as "not spam." 1. Sign in to AOL Mail. 2. Click the Spam folder. 3. Select the message that isn't spam. 4.

  8. Email sender verification notice - AOL Help

    help.aol.com/articles/email-sender-verification...

    If you've confirmed the message is safe, we recommend you review your connected devices, confirm or delete your app password, or use the AOL app to ensure continued safe access to your account. If you think the message indicates suspicious activity, we recommend you change your password and secure your account.

  9. Hybrid automatic repeat request - Wikipedia

    en.wikipedia.org/.../Hybrid_automatic_repeat_request

    Receivers detecting a corrupted message will request a new message from the sender. In Hybrid ARQ, the original data is encoded with an FEC code, and the parity bits are either immediately sent along with the message or only transmitted upon request when a receiver detects an erroneous message.