Computer Networks Lecture 6: Electronic Mail and Streaming Multimedia
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Questions and Answers

What is the first step taken by Alice when she wants to send a message to Bob via email?

  • Alice opens a TCP connection with Bob’s mail server.
  • Alice's mail server places the message in Bob's mailbox.
  • Alice’s user agent composes the message. (correct)
  • Alice’s user agent sends the message to her mail server.

    • What protocol does SMTP use to exchange email messages?

  • HTTP
  • FTP
  • SMTP (correct)
  • TCP

    • Which protocol is primarily used for retrieving emails from the mail server?

  • FTP
  • POP
  • SMTP
  • IMAP (correct)

    • What type of connection does SMTP use for transferring emails?

    <p>Persistent connection</p> Signup and view all the answers

    What role does the user agent play in the process of sending an email?

    <p>Composing the message</p> Signup and view all the answers

    What is the main responsibility of Simple Mail Transfer Protocol (SMTP) in the context of electronic mail?

    <p>Reliably transferring email messages between mail servers</p> Signup and view all the answers

    Which component is responsible for composing, editing, and reading mail messages in electronic mail?

    <p>User agent</p> Signup and view all the answers

    What is the role of the mail server in electronic mail?

    <p>Managing the mailbox and message queue</p> Signup and view all the answers

    Which application layer protocol is responsible for the connection between mail servers in electronic mail?

    <p>SMTP</p> Signup and view all the answers

    On which port does SMTP use TCP to reliably transfer email messages?

    <p>Port 25</p> Signup and view all the answers

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