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What tool did Tom employ to detect and respond to real-time spear phishing incidents?

1. Cisco Umbrella

2. Barracuda Impersonation Protection

3. Mimecast Email Security

4. Symantec Email Security.cloud

The correct answer is: Barracuda Impersonation Protection

The choice of Barracuda Impersonation Protection as the tool that Tom employed to detect and respond to real-time spear phishing incidents is well-founded due to its specific features designed to combat phishing attacks, particularly those that mimic trusted individuals or organizations. This tool is specifically tailored to recognize and block impersonation attempts that are common in spear phishing scenarios, where attackers attempt to deceive users by pretending to be someone they know. Barracuda Impersonation Protection utilizes advanced algorithms and threat intelligence to analyze incoming emails, checking for anomalies in sender behavior, domain spoofing, and other indicators that suggest an email may be malicious. Its capabilities include real-time scanning of emails, impersonation detection, and automated response functions that can alert users to threats, thereby enhancing security measures significantly against this type of targeted attack. In contrast, while tools like Cisco Umbrella, Mimecast Email Security, and Symantec Email Security.cloud offer strong overall email security functionalities including spam filtering and malware detection, they may not provide the same level of specific response mechanisms or features tailored for impersonation and spear phishing as Barracuda. Their focus can often be broader, covering general email threats rather than the nuanced intricacies of spear phishing protection that Barracuda is specifically designed for.