Which product listed below is a fully managed service for threat hunting?

The chosen answer, which identifies the Managed Detection and Response (MDR) service as a fully managed service for threat hunting, is correct because MDR provides comprehensive monitoring and management designed to detect, respond to, and neutralize advanced threats on an ongoing basis.

MDR services utilize a combination of technology and human expertise, enabling organizations to effectively identify potential security incidents in real-time. These services not only focus on detecting threats but also include active threat hunting, where security teams proactively seek out vulnerabilities and threats that may not be immediately obvious. This contrasts with other security solutions that may only provide alerts or data but do not take action or have the level of operational management that MDR provides.

In comparison, SIEM (Security Information and Event Management) solutions gather and analyze security log data but typically require organizations to manage the system and interpret the results themselves. A VPN (Virtual Private Network) primarily focuses on secure remote access and data encryption, and a firewall serves to protect a network by controlling incoming and outgoing traffic based on predetermined security rules. Neither of these functions provides the active threat hunting capabilities that are a hallmark of MDR services.