Email Headers and Message Transfer Protocol Quiz

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What is the purpose of a root server in the DNS system?

To provide information on name servers for different domains (correct)

To act as a local server for individual computers

To store email messages for retrieval

To encrypt email communication for security

Why are root servers in the DNS system powerful and heavily replicated?

To store all the email messages for the entire Internet

To handle and respond to queries from all the name servers on the Internet (correct)

To ensure they act as local servers for individual computers

To reduce the cost of maintaining multiple servers

After obtaining the name server for a particular domain, what is the next step in the DNS query process?

Send an email to the identified name server

Send the entire query to the identified name server (correct)

Continue sending requests to the root server

Query the root server for the IP address

Which of the following statements about the email system architecture is TRUE?

Email architecture is shown in a graphical representation Signup and view all the answers

What is the role of a local name server in the DNS query process?

To continue the resolution process by sending queries to specific name servers Signup and view all the answers

What distinguishes email from traditional mail?

Email provides a faster and cheaper way of communication Signup and view all the answers

What is the primary function of message transfer agents?

To automatically move email through the system from the originator to the recipient Signup and view all the answers

What is the term for the process of sending new messages into the mail system for delivery?

Mail submission Signup and view all the answers

What is the purpose of mailboxes?

To store email that is received for a user Signup and view all the answers

What protocol is used by message transfer agents to move email through the system?

SMTP Signup and view all the answers

What is another term for message transfer agents?

Mail servers Signup and view all the answers

What is the role of mail servers in maintaining mailboxes?

They maintain mailboxes Signup and view all the answers

What protocol is used by a mail server to accept incoming connections?

SMTP (Simple Mail Transfer Protocol) Signup and view all the answers

What information is typically filled in the Received: headers?

The sender’s address only Signup and view all the answers

What happens when a message cannot be delivered?

An error report containing the first part of the undeliverable message is returned to the sender Signup and view all the answers

What is the role of a mail server in final delivery of a mail message?

To transfer a copy of the message to the recipient's user agent for display Signup and view all the answers

What was the relationship between the user agent and mail transfer agent in the early Internet?

They ran on the same machine as different processes Signup and view all the answers

How does a mail server accept incoming connections?

Subject to some security checks Signup and view all the answers