Which protocol is used to send email messages?

Which protocol is used to send email messages?

• A. HTTP
• B. SMTP
• C. FTP
• D. DNS

Answer: (B)

The Simple Mail Transfer Protocol (SMTP) is the protocol specifically designed for sending email messages across the Internet. It operates over TCP, typically using port 25, and facilitates the transfer of email from the sender's mail server to the recipient's mail server. SMTP is essential for enabling communication between email servers and ensuring that messages are properly routed and delivered. While HTTP is used for transferring hypertext and web content, FTP handles the transfer of files between systems, and DNS translates domain names to IP addresses, none of these protocols are used for the core purpose of sending emails. SMTP is thus the correct choice in the context of sending email messages, as it is exclusively designed for that function.

The Simple Mail Transfer Protocol (SMTP) is the protocol specifically designed for sending email messages across the Internet. It operates over TCP, typically using port 25, and facilitates the transfer of email from the sender's mail server to the recipient's mail server. SMTP is essential for enabling communication between email servers and ensuring that messages are properly routed and delivered.

While HTTP is used for transferring hypertext and web content, FTP handles the transfer of files between systems, and DNS translates domain names to IP addresses, none of these protocols are used for the core purpose of sending emails. SMTP is thus the correct choice in the context of sending email messages, as it is exclusively designed for that function.