220-1101 Question #499: Real Exam Question with Answer & Explanation

The correct answer is C: SPF. SPF stands for Sender Policy Framework, which is a protocol that allows domain owners to specify which IP addresses are authorized to send email on behalf of their domains. SPF helps prevent email spoofing and phishing by verifying the sender's identity and preventing unauthorize

Networking

Question

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

Options

ADKIM
BMX
CSPF
DDMARC

Explanation

SPF stands for Sender Policy Framework, which is a protocol that allows domain owners to specify which IP addresses are authorized to send email on behalf of their domains. SPF helps prevent email spoofing and phishing by verifying the sender's identity and preventing unauthorized use of their domain name. When an email is received, the receiving server checks the SPF record of the sender's domain, which is a DNS TXT record that lists the valid IP addresses for that domain. The server then compares the sender's IP address with the SPF record and determines if it matches or not. If it matches, the email passes the SPF check and is accepted; if it does not match, the email fails the SPF check and is rejected or marked as spam.

Topics

#Email security#SPF#Email authentication#DNS records

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