Which of the following devices is commonly deployed for Intrusion Detection Systems (IDS) within a network?

Intrusion Detection Systems (IDS) are critical components in network security, designed to monitor and analyze network traffic for signs of suspicious activities or policy violations. Each of the listed devices can play a role in providing IDS capabilities, enhancing the overall security posture of a network.

Network proxies typically serve as intermediaries between clients and servers in a network. They can perform packet inspection and filtering, and some advanced network proxies include IDS functionalities that help in detecting anomalies or unauthorized access attempts.

Firewalls are essential security devices that control the incoming and outgoing network traffic based on predetermined security rules. While their primary function is not that of detection, modern firewalls often incorporate IDS features, allowing them to identify, alert, and sometimes take action against intrusion attempts that pass through the firewall policies.

Database Activity Monitors focus on monitoring and analyzing database activity. They can detect suspicious behavior or potential breaches by monitoring SQL queries and access patterns in databases. While they are not traditional IDS devices for network traffic, they provide important insights and detection capabilities specifically for database environments.

The correct answer indicates that all these devices can contribute to intrusion detection in different aspects of security—network, application, and database levels—highlighting the multi-faceted approach required to secure a network comprehensively against intrusions