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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    It alerts the client to wait for a final response. The message consists only of the status line and optional header fields, and is terminated by an empty line. As the HTTP/1.0 standard did not define any 1xx status codes, servers must not [note 1] send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions. 100 Continue

  3. Student and Exchange Visitor Program - Wikipedia

    en.wikipedia.org/wiki/Student_and_Exchange...

    The fee needs to be paid only for the principal (the F-1, J-1, or M-1). Dependents (F-2, J-2, and M-2) do not need to pay the fee. Also, the fee needs to be paid only once per initial SEVIS record, and in particular, does not need to be paid again if applying for a new visa on the same status. [28]

  4. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    The server attempted to access another server in attempting to process the request, and did not receive a prompt response. [1]: §21.5.5 505 Version Not Supported The SIP protocol version in the request is not supported by the server. [1]: §21.5.6 513 Message Too Large The request message length is longer than the server can process.

  5. List of SMTP server return codes - Wikipedia

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

    214 Help message (A response to the HELP command) 220 <domain> Service ready 221 <domain> Service closing transmission channel 221 2.0.0 Goodbye [1] 235 2.7.0 Authentication succeeded [3] 240 QUIT 250 Requested mail action okay, completed 251 User not local; will forward 252 Cannot verify the user, but it will try to deliver the message anyway

  6. Reasons AOL deactivates or deletes an account - AOL Help

    help.aol.com/articles/reasons-aol-deactivates-or...

    Find out more about why your AOL account may have been deactivated or deleted.

  7. I-20 (form) - Wikipedia

    en.wikipedia.org/wiki/I-20_(form)

    The Form I-20 (also known as the Certificate of Eligibility for Nonimmigrant (F-1) Student Status-For Academic and Language Students) is a United States Department of Homeland Security, specifically ICE and the Student and Exchange Visitor Program (SEVP), document issued by SEVP-certified schools (colleges, universities, and vocational schools) that provides supporting information on a student ...

  8. Acknowledgement (data networks) - Wikipedia

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

    Many protocols are acknowledgement-based, meaning that they positively acknowledge receipt of messages. The internet's Transmission Control Protocol (TCP) is an example of an acknowledgement-based protocol. When computers communicate via TCP, received packets are acknowledged by sending a return packet with an ACK bit set. [3]

  9. End-of-Text character - Wikipedia

    en.wikipedia.org/wiki/End-of-text_character

    February 2024) (Learn how and when to remove this message) The End-of-Text character ( ETX ) is a control character used to inform the receiving computer that the end of a record has been reached. This may or may not be an indication that all of the data in a record have been received.