What is a common function shared by firewalls and intrusion detection systems (IDS)?

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The choice regarding the monitoring of network traffic for unauthorized access accurately describes a fundamental similarity between firewalls and intrusion detection systems (IDS). Both security technologies are essential components of an organization's defense strategy.

Firewalls are designed to control access to network resources by allowing or blocking traffic based on established security rules. They inspect incoming and outgoing network packets to determine if the traffic is legitimate according to the organization's policies. This function helps prevent unauthorized access and protects the internal network from external threats.

Intrusion detection systems, on the other hand, monitor network traffic and system activities for suspicious behavior or known threats. IDS analyzes traffic patterns and alerts administrators to potential security breaches or unusual activities that may indicate an attack or violation of security policies.

Both technologies complement each other by providing layered security: firewalls act as a barrier to filter traffic while IDS monitors and alerts on suspicious activity, helping to enhance the overall security posture of an organization.

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