CompTIA A+ Core 1 (220-1101) — Question 465

Which of the following services checks whether the sender's IP address is associated with the sender’s domain name when receiving email?

Answer options

• A. DKIM
• B. MX
• C. SPF
• D. DMARC

Correct answer: C

Explanation

The correct answer is C, SPF, which stands for Sender Policy Framework. SPF is specifically designed to check if the IP address of the sending server is authorized to send emails on behalf of the domain. DKIM verifies the integrity of the message, MX refers to mail exchange servers, and DMARC builds upon SPF and DKIM to provide a policy for email validation but does not check the IP address directly.