Isaca Updated CRISC Exam Questions and Answers by mylo

An intrusion detection system (IDS) is a network security tool that monitors and analyzes network traffic for signs of malicious or suspicious activity, such as unauthorized access, data exfiltration, malware infection, or denial-of-service attack. An IDS can detect and alert the organization to potential threats based on predefined rules or signatures, or based on anomalies or deviations from normal network behavior. An IDS can also generate logs that record the details of the network events and incidents, such as the source, destination, content, and context of the network traffic. By analyzing the IDS logs, the organization can identify and validate the suspicious network activity, and determine its scope, impact, and root cause. The organization can also use the IDS logs to support the incident response and remediation process, and to improve the network security and resilience. The other options are less effective ways to ensure that suspicious network activity is identified. Analyzing server logs can provide some information about the network activity, but it may not be sufficient or timely to detect and validate the suspicious or malicious activity, as server logs only capture the events or activities that occur on the server, and not on the entire network. Using a third-party monitoring provider can help to outsource the network monitoring and analysis function, but it may not be the best option, as it may introduce additional risks, such as data privacy, vendor reliability, or service quality issues. Coordinating events with appropriate agencies can help to share information and resources with other organizations or authorities, such as law enforcement, regulators, or industry peers, but it may not be the best option, as it may depend on the availability andcooperation of theagencies, and it may not be feasible or desirable to disclose the network activity to external parties. References = Monitoring for Suspicious Network Activity: Key Tips to Secure Your Network 1

 Key control indicators (KCIs) are metrics that measure how well a specific control is performing in reducing the causes, consequences, or likelihood of a risk1. KCIs are used to evaluate the control operating effectiveness, which is the degree to which a control achieves its intended objectives and mitigates the risk2.

The primary reason to use KCIs to evaluate control operating effectiveness is to monitor the achievement of set objectives. This means that KCIs help to:

Track and report the progress and performance of the control against the predefined targets, standards, or benchmarks

Identify and address any gaps, deviations, or issues in the control operation or outcome

Provide feedback and assurance to the stakeholders and regulators on the adequacy and reliability of the control

Support the continuous improvement and optimization of the control3

References = Key Control Indicator (KCI) - CIO Wiki, Evaluating and Improving Internal Control in Organizations - IFAC, A Methodical Approach to Key Control Indicators

User recertification is the most effective control to ensure user access is maintained on a least-privilege basis, as it involves a periodic review and validation of user access rights and privileges by the appropriate authority. User recertification helps to identify and remove any unnecessary, excessive, or obsolete access rights and privileges that may pose a security risk or violate the principle of least privilege. User recertification also helps to ensure that user access rights and privileges are aligned with the current business needs, roles, and responsibilities of the users.

The other options are not the most effective controls to ensure user access is maintained on a least-privilege basis. User authorization is the process of granting or denying access rights and privileges to users based on their identity, role, and credentials, but it does not verify or update the existing access rights and privileges of the users. Change log review is the process of examining and analyzing the records of changes made to the system, configuration, or data, but it does not directly address the user access rights and privileges. Access log monitoring is the process of tracking and auditing the user activities and actions on the system or network, but it does not validate or modify the user access rights and privileges. References = What Is the Principle of Least Privilege and Why is it Important?, Principle of Least Privilege: Definition, Methods & Examples, IT Risk Resources | ISACA