Computer Networks Lecture 6: Electronic Mail and DNS
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Questions and Answers

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

  • Domain Name System (DNS)
  • Mail server
  • User agent (correct)
  • SMTP

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

  • Composing, editing, and reading mail messages
  • Managing the message queue of outgoing mail messages
  • Storing all messages of the user
  • Reliably transferring email messages between mail servers (correct)

    • Where does SMTP protocol work to send email messages?

  • Within the domain name system (DNS)
  • Between mail servers (correct)
  • On the user agent
  • In the message queue of outgoing mail messages

    • Which protocol uses TCP to reliably transfer email messages on port 25?

    <p>Simple Mail Transfer Protocol (SMTP) (C)</p> Signup and view all the answers

    What is the primary function of mail servers in electronic mail?

    <p>Storing all messages of the user (D)</p> Signup and view all the answers

    What is the correct sequence of steps for sending an email from Alice to Bob?

    <p>1, 2, 3, 4, 5, 6 (A)</p> Signup and view all the answers

    In the context of SMTP messages, what does the status code '250' represent?

    <p>Message accepted for delivery (B)</p> Signup and view all the answers

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

    <p>Internet Mail Access Protocol (IMAP) (D)</p> Signup and view all the answers

    What distinguishes Post Office Protocol (POP) from Internet Mail Access Protocol (IMAP)?

    <p>IMAP allows the organization of messages in folders; POP does not. (B)</p> Signup and view all the answers

    What is the main difference between SMTP and HTTP?

    <p>SMTP does not support session management or cookies; HTTP supports session management and cookies to maintain state. (D)</p> Signup and view all the answers

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