Isaca Updated CISA Exam Questions and Answers by wilf

 The most reliable way for an IS auditor to evaluate the operational effectiveness of an organization’s data loss prevention (DLP) controls is to verify that confidential files cannot be transmitted to a personal USB device. This is because DLP controls are designed to prevent the loss, leakage or misuse of sensitive data through breaches, ex-filtration transmissions and unauthorized use1. A personal USB device is a common way for data to be stolen or compromised, as it can bypass network security measures and allow unauthorized access to confidential files. Therefore, testing the DLP controls by attempting to copy or transfer confidential files to a personal USB device can provide a direct and objective evidence of whether the DLP controls are working as intended or not.

The other options are less reliable ways for an IS auditor to evaluate the operational effectiveness of an organization’s DLP controls. Reviewing data classification levels based on industry best practice is a way to assess the adequacy of the organization’s data protection policies, but it does not measure how well the DLP controls are implemented or enforced in practice. Verifying that current DLP software is installed on all computer systems is a way to check the technical configuration of the DLP solution, but it does not test how well the DLP software detects and prevents data loss incidents in real scenarios. Conducting interviews to identify possible data protection vulnerabilities is a way to gather qualitative information from stakeholders, but it does not provide quantitative or empirical data on the actual performance of the DLP controls.

Transposition and transcription errors occur when characters or numbers are accidentally swapped or misentered during data entry.

Option A (Incorrect):Duplicate checks ensure that the same record is not entered twice but do not specifically detect transposition or transcription errors.

Option B (Incorrect):Completeness checks ensure that all required data is entered but do not validate data accuracy.

Option C (Incorrect):Sequence checks verify that records follow a logical sequence but do not catch errors within individual data entries.

Option D (Correct):Acheck digitis an additional number generated through an algorithm (e.g., Luhn algorithm for credit cards) that helps detect errors such as transpositions (e.g., swapping digits 45 → 54) and transcriptions (e.g., mistyping 8 as 3).

The use of access control lists (ACLs) is the most effective method to mitigate security risk for routers because they can limit Telnet and traffic from the open Internet. Telnet is a protocol that allows remote access to a device, which can pose a security threat if not properly controlled. Traffic from the open Internet can also contain malicious packets that can harm the network or the router itself. ACLs act as filters that can block or allow specific types of traffic based on predefined criteria, such as source and destination addresses, protocols, ports, and flags. By using ACLs, routers can prevent unauthorized access and reduce the exposure to potential attacks.

 Version control is a process of managing changes to an application or a document. It ensures that only the latest approved version of the application is used by end-users, which reduces the risk of errors, inconsistencies, and unauthorized modifications. Version control also allows tracking the history of changes and restoring previous versions if needed.