What is an Intrusion Detection System (IDS) primarily used for?

An Intrusion Detection System (IDS) is primarily utilized to monitor network traffic and systems for signs of malicious activity or policy violations. It works by analyzing data patterns and alerts administrators about suspicious behavior that could indicate an attempted breach, unauthorized access, or other security threats. This proactive monitoring allows organizations to respond promptly to potential security incidents, thereby enhancing their overall security posture.

Improving network speeds is not the focus of an IDS; instead, its purpose is to observe and report on security-related events. Providing user access control pertains more to identity and access management systems rather than the role of an IDS. Facilitating data backup procedures is also outside the scope of an IDS, as backup systems are dedicated to ensuring data availability and recovery rather than monitoring threats. Therefore, monitoring for signs of attack is the fundamental function of an IDS, making it the correct choice.