Get PCI QSA_New_V4 Exam Dumps

Answer : C

Time Synchronization Standards:

PCI DSS Requirement 10.4 mandates that all critical systems use a centralized time server to ensure time accuracy across systems. Approved external sources provide a reliable and consistent time signal.

Correctness and Consistency of Time:

Using a central time server ensures uniformity of timestamps, which is critical for forensic analysis, log correlation, and monitoring activities.

Invalid Options:

A: Internal systems acting as their own servers could lead to inconsistent timestamps.

B: Allowing all users access to time settings poses a security risk.

D: Peering directly with external sources bypasses centralized control, violating consistency requirements.

Answer : B

PCI DSS Requirement:

Requirement 11.4 mandates the implementation of intrusion detection and/or intrusion prevention techniques to alert personnel of suspected compromises within the cardholder data environment (CDE).

Purpose of IDS/IPS:

These systems are deployed to identify potential threats and alert relevant personnel, enabling them to take corrective actions to prevent data breaches.

Rationale Behind Correct Answer:

A: Intrusion detection is required only for in-scope components, not all system components.

C/D: Intrusion detection systems do not perform isolation or identification of all cardholder data; they monitor for and alert on potential intrusions.

Answer : A

Purpose of Classifying Media

PCI DSS v4.0 emphasizes the need to classify media based on the sensitivity of the data it contains. Media classification ensures appropriate handling, storage, and destruction processes.

Media Protection Requirements

Media containing cardholder data must be securely stored, transferred, and destroyed when no longer needed.

Classification informs the level of protection required, such as encryption, physical security, or controlled access.

Incorrect Options

Option B: Moving media quarterly is not a requirement.

Option C: Labeling as 'Confidential' is insufficient without a comprehensive protection strategy.

Option D: Destruction schedules should depend on retention requirements and data sensitivity, not a universal timeline.

Answer : D

Segmentation Defined

PCI DSS v4.0 specifies that effective segmentation separates the CDE from out-of-scope environments, minimizing the risk of unauthorized access to cardholder data.

Key Requirements for Segmentation

Network traffic between the CDE and out-of-scope networks must be completely prevented. This ensures that out-of-scope systems cannot introduce risks to the CDE.

Methods like firewalls, ACLs (Access Control Lists), and other technologies may be used to enforce segmentation.

Incorrect Options

Monitoring or logging traffic (Options A and B) without preventing access does not achieve segmentation.

Virtual LANs (Option C) alone are insufficient unless properly configured to enforce traffic isolation.

Answer : D

Scope of Change-Detection Mechanisms

PCI DSS v4.0 requires the implementation of a change-detection mechanism (e.g., file-integrity monitoring) to monitor unauthorized changes to critical files.

Critical files include system configuration and parameter files, application executable files, and scripts used in administrative functions.

Intent of Monitoring System Files

These files often control security settings and operational parameters of systems within the Cardholder Data Environment (CDE). Unauthorized changes could compromise system security.

Exclusions

Documents like application vendor manuals and security policies do not qualify as files requiring integrity monitoring since they do not directly impact the security posture or operational functions of systems in the CDE.