Question Description

An e$-$commerce company has recently experienced a series of phishing attacks targeting its employees. The company tasks the security team with implementing a solution to prevent email spoofing and protect against future phishing attempts. Which of the following technologies would be the most effective at achieving this goal?

A$.$ Two$-$factor authentication

B$.$ DNS$-$based Authentication of Named Entities $($DANE$)$

C$.$ Sender Policy Framework $($SPF$)$

D$.$ Public key infrastructure $($PKI$)$