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Racheal is an incident handler working in InceptionTech organization. Recently, numerous employees are complaining about receiving emails from unknown senders. In order to prevent employees against spoofing emails and keeping security in mind, Racheal was asked to take appropriate actions in this matter. As a part of her assignment, she needs to analyze the email headers to check the authenticity of received emails. Which of the following protocol/authentication standards she must check in email header to analyze the email authenticity?
Correct Answer: A
Racheal should check for DKIM (DomainKeys Identified Mail) in the email headers to analyze the authenticity of received emails. DKIM is an email authentication method designed to detect email spoofing. It provides a way for the receiver to check that an email claimed to have come from a specific domain was indeed authorized by the owner of that domain. It achieves this by affixing a digital signature, linked to a domain name, to each outgoing email message. The recipient can verify this signature to confirm that the email was not altered during its transmission and that it indeed comes from the specified domain, thereby helping to prevent email spoofing. Other options like SNMP (Simple Network Management Protocol), POP (Post Office Protocol), and ARP (Address Resolution Protocol) are not directly related to email authenticity checks.References:Incident Handler (CREST CPTIA) certification materials cover various protocols and standards for ensuring the security and authenticity of communications, including email security protocols like DKIM.