Intrusion Detection System (IDS)

A.

An intrusion detection system (IDS) is a device or software application that monitors network and/or system activities for malicious activities or policy violations and produces reports to a Management Station.

Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.

Intrusion detection and prevention systems (IDPS) are primarily focused on identifying possible incidents, logging information about them, and reporting attempts.

In addition, organizations use IDPS for other purposes, such as identifying problems with security policies, documenting existing threats, and deterring individuals from violating security policies.

As IDS detects and gives warning when the violation of security policies of the enterprise occurs, it is a detective control.

Incorrect Answers: B: These controls make effort to reduce the impact of a threat from problems discovered by detective controls.

As IDS only detects but not reduce the impact, hence it is not a corrective control.

C: As IDS only detects the problem when it occurs and not prior of its occurrence, it is not preventive control.

D: These controls make efforts to overcome the impact of the incident on the business, hence IDS is not a recovery control.

An intrusion detection system (IDS) is a type of control that falls under the category of detective controls. A detective control is a type of control that identifies and detects deviations from expected security policies or controls. The primary objective of a detective control is to identify any unauthorized access, attacks, or security breaches that might occur within an information system.

An IDS is a security tool that monitors network traffic for signs of unauthorized access or malicious activity. It can identify security policy violations, such as attempts to access restricted areas or use unauthorized applications. When an IDS identifies such an activity, it raises an alert or warning so that appropriate action can be taken to mitigate the risk.

Detective controls, such as an IDS, play an essential role in an enterprise's overall security posture by identifying potential risks and vulnerabilities before they can result in significant damage. They help to reduce the time it takes to identify and respond to security incidents, enabling an organization to take corrective measures quickly.

In contrast to a preventive control, which is designed to prevent unauthorized access or activity, an IDS operates after an incident has already occurred. Preventive controls are aimed at stopping security incidents from happening in the first place. Corrective controls, on the other hand, are put in place to address security incidents once they have occurred. Recovery controls are implemented to restore normal business operations after a security incident has been resolved.

In summary, an IDS is a detective control that is used to identify security policy violations and potential security breaches within an information system. It operates by monitoring network traffic for signs of unauthorized activity and raising alerts or warnings when such activity is detected.