18 Questions
What is the purpose of a root server in the DNS system?
To provide information on name servers for different domains
Why are root servers in the DNS system powerful and heavily replicated?
To handle and respond to queries from all the name servers on the Internet
After obtaining the name server for a particular domain, what is the next step in the DNS query process?
Send the entire query to the identified name server
Which of the following statements about the email system architecture is TRUE?
Email architecture is shown in a graphical representation
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
What distinguishes email from traditional mail?
Email provides a faster and cheaper way of communication
What is the primary function of message transfer agents?
To automatically move email through the system from the originator to the recipient
What is the term for the process of sending new messages into the mail system for delivery?
Mail submission
What is the purpose of mailboxes?
To store email that is received for a user
What protocol is used by message transfer agents to move email through the system?
SMTP
What is another term for message transfer agents?
Mail servers
What is the role of mail servers in maintaining mailboxes?
They maintain mailboxes
What protocol is used by a mail server to accept incoming connections?
SMTP (Simple Mail Transfer Protocol)
What information is typically filled in the Received: headers?
The sender’s address only
What happens when a message cannot be delivered?
An error report containing the first part of the undeliverable message is returned to the sender
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
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
How does a mail server accept incoming connections?
Subject to some security checks
Test your knowledge on email headers and message transfer protocols used in the delivery of emails. Explore topics like the information gathered from Received headers and the process of transferring messages using SMTP.
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