Question

A client submits email to a mail server using a service that requires encryption before authentication. Which combination is appropriate?

Q: Answer-A client submits email to a mail server using a service that requires encryption before authenticati...

SMTP is the application protocol for mail transfersubmission. TLS can protect SMTP submission, commonly through STARTTLS or an implicit TLS mode depending on the service.

A SMTP over an encrypted transport such as TLS for secure submission.

B DNS over ARP because mail servers require MAC-based authentication.

C FTP over ICMP because SMTP is limited to file-transfer sessions.

D HTTP over UDP because email submission does not need reliability.

E DHCP over TCP because credentials must be assigned dynamically.

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A client submits email to a mail server using a service that requires encryption before authentication. Which combination is appropriate?

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