2.2-application-SMTP DNS
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Questions and Answers

Which protocol does Alice's UA use to send her email message to her mail server?

  • HTTP
  • UDP
  • TCP
  • SMTP (correct)

    • What does Bob's mail server do after receiving the email message from Alice's mail server?

  • Sends a confirmation message to Alice's UA
  • Places the message in Bob's mailbox (correct)
  • Deletes the message
  • Sends the message back to Alice's mail server

    • What does Alice's UA use to compose the email message?

  • SMTP
  • UDP
  • TCP
  • User Agent (correct)

    • What does the SMTP client do after Alice's message is placed in the message queue?

    <p>Sends Alice's message over the TCP connection</p> Signup and view all the answers

    Which protocol does the client side of SMTP at the mail server use to open a TCP connection with Bob's mail server?

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

    Which protocol is used for retrieving email messages from a server?

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

    Which application layer protocol is used by web-based email services like Gmail and Hotmail?

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

    What is the purpose of DNS name resolution?

    <p>Resolving domain names to IP addresses</p> Signup and view all the answers

    What type of query places the burden of name resolution on the contacted name server?

    <p>Recursive query</p> Signup and view all the answers

    What is the role of the root DNS server in the DNS name resolution process?

    <p>It resolves domain names to IP addresses</p> Signup and view all the answers

    What are the two mail access protocols mentioned in the text?

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

    What is the purpose of SMTP?

    <p>To deliver and store email messages to the receiver's server</p> Signup and view all the answers

    What does the IMAP protocol provide?

    <p>Retrieval, deletion, and folders of stored messages on the server</p> Signup and view all the answers

    Which application layer protocol is used by web-based email services?

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

    What is the difference between iterated query and recursive query in DNS name resolution?

    <p>Iterated query receives the name of the server to contact, while recursive query puts the burden of name resolution on the contacted name server</p> Signup and view all the answers

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