What is the primary focus of network-based intrusion detection systems (NIDS)?

The primary focus of network-based intrusion detection systems (NIDS) is to analyze network traffic for potential attacks. NIDS works by examining the incoming and outgoing network packets in real-time to identify suspicious activity and potential threats. This monitoring helps in detecting a wide range of security threats, including malware, unauthorized access attempts, and other malicious behaviors that might compromise network security.

By using predefined rules, signatures, or anomaly detection methods, NIDS can identify patterns that indicate an intrusion or other malicious activity. This proactive monitoring is crucial for early detection and response, allowing organizations to react swiftly to potential security incidents before they escalate into significant breaches.

In contrast, host-based monitoring focuses on individual devices, encryption deals with securing data transmission, and user account management pertains to access control and user permissions rather than directly detecting intrusion attempts on the network level.