Which strategy is important in perimeter security?

The strategy of implementing firewalls and intrusion detection systems is crucial in perimeter security because it establishes a strong defense against unauthorized access and potential attacks from outside networks. Firewalls act as a barrier that controls incoming and outgoing network traffic based on predetermined security rules, which helps to prevent malicious actors from infiltrating the network. Intrusion detection systems complement firewalls by monitoring network traffic for suspicious activities or policy violations, alerting administrators to potential security breaches in real-time.

Together, these technologies form a critical part of an organization's cybersecurity posture, effectively protecting sensitive information and maintaining the integrity of the network. While other strategies may contribute to overall security, such as physical surveillance and employee training, the role of firewalls and intrusion detection is specifically aligned with protecting the network perimeter from digital threats, which is essential in a world where cyber attacks are increasingly sophisticated and prevalent.