Consider the set of activities related to e-mail A : Send an e-mail from a…

2017

Consider the set of activities related to e-mail A : Send an e-mail from a mail client to mail server B : Download e-mail headers from mail box and retrieve mails from server to a cache C : Checking e-mail through a web browser The application level protocol used for each activity in the same sequence is

  1. A.

    SMTP, HTTPS, IMAP

  2. B.

    SMTP, POP, IMAP

  3. C.

    SMTP, IMAP, HTTPS

  4. D.

    SMTP, IMAP, POP

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Correct answer: C

Activity A describes sending email from a client to a server, which uses the Simple Mail Transfer Protocol (SMTP). Activity B describes retrieving emails from a server to a local cache, which uses POP3 or IMAP. Activity C describes checking email through a web browser, which relies on HTTP/HTTPS protocols for web access.

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