Practice Quiz

CompTIA A+ 220-901

Category - Networking

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Which of the following protocols is used to send messages to the e-mail server for relaying?
  1. Simple Mail Transfer Protocol (SMTP)
  2. Post Office Protocol, version 3 (POP3)
  3. Internet Control Message Protocol (ICMP)
  4. Internet Message Access Protocol, version 4 (IMAP4)
Explanation
Answer: A-SMTP is a text-based protocol used to send messages to a mail server for relaying. The mail sender communicates with the mail receiver by issuing simple command strings and supplying necessary data over a TCP connection.

Key Takeaway: SMTP, unlike POP or IMAP, is a delivery protocol, not a retrieval protocol. It cannot pull messages from a remote server on demand. POP and IMAP are specifically designed for retrieving messages and managing mailboxes.
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