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In a smart manufacturing environment, a company is implementing Cisco IoT security solutions to protect its operational technology (OT) from cyber threats. The security team is tasked with ensuring that all devices connected to the network are authenticated and that data integrity is maintained. They decide to use a combination of device identity management, secure communication protocols, and continuous monitoring. Which approach best describes the comprehensive security strategy they should adopt to achieve these goals?
Implementing a zero-trust architecture that requires continuous verification of device identities and encrypting all data in transit using protocols like TLS or DTLS, while also employing anomaly detection systems to monitor for unusual behavior across the network.
Relying solely on traditional firewalls to block unauthorized access and using basic password protection for all devices connected to the network.
Utilizing a single-layer security approach that focuses only on perimeter defenses without considering internal threats or device authentication.
Deploying a security information and event management (SIEM) system without integrating it with other security measures, assuming it will provide sufficient protection against all threats.

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