CISA Exam Dumps - Certified Information Systems Auditor

The recovery time objective (RTO) is the most important consideration when making a decision to invest in a hot site due to service criticality. The RTO is the maximum acceptable time that an IT service or process can be unavailable or disrupted before it causes significant damage to the business operations and objectives. A hot site is a fully equipped and operational backup facility that can be activated immediately in the event of a disaster or disruption. A hot site can help an organization achieve a very low RTO, as it can resume the service with minimal or no downtime. The maximum tolerable downtime (MTD) is the maximum acceptable time that an IT service or process can be unavailable or disrupted before it causes intolerable damage to the business operations and objectives. The MTD is usually longer than the RTO, as it represents the worst-case scenario. The recovery point objective (RPO) is the maximum acceptable amount of data loss that an IT service or process can tolerate in the event of a disaster or disruption. The RPO is measured in terms of time, such as hours or minutes, and indicates how frequently the data should be backed up or replicated. The mean time to repair (MTTR) is the average time that it takes to restore an IT service or process after a failure or disruption. The MTTR is a measure of the efficiency and effectiveness of the recovery process, but it does not reflect the service criticality or the business impact. References: IS Audit and Assurance Tools and Techniques, CISA Certification | Certified Information Systems Auditor | ISACA

Consolidating multiple applications on asingle serverincreases the risk that aserver outagewillimpact multiple applicationssimultaneously.

More Applications Affected by Outage (Correct Answer – B)

Asingle point of failurecoulddisrupt multiple services.

Example:If aconsolidated server crashes, all hosted applications gooffline.

Higher OS License Fees (Incorrect – A)

License feesmay increase, butdowntime risk is a greater concern.

Simplified Asset Management (Incorrect – C)

True, butdoes not outweigh the availability risk.

Fewer Vulnerability Scans (Incorrect – D)

Reducing the number of serversdoes not reduce security risks.

The most effective way to maintain network integrity when using mobile devices is to implement network access control. Network access control is a security control that regulates and restricts access to network resources based on predefined policies and criteria, such as device type, identity, location, or security posture. Network access control can help maintain network integrity when using mobile devices by preventing unauthorized or compromised devices from accessing or affecting network systems or data. The other options are not as effective as network access control in maintaining network integrity when using mobile devices, as they do not address all aspects of network access or security. Implementing outbound firewall rules is a security control that filters and blocks network traffic based on source, destination, protocol, or port, but it does not regulate or restrict network access based on device characteristics or conditions. Performing network reviews is a monitoring activity that evaluates and reports on the performance, availability, or security of network resources, but it does not regulate or restrict network access based on device characteristics or conditions. Reviewing access control lists is a verification activity that validates and confirms the access rights and privileges of network users or devices, but it does not regulate or restrict network access based on device characteristics or conditions. References: CISA Review Manual (Digital Version), Chapter 5, Section 5.2.2

The best answer is B. Implementing cryptographic hash functions.

To ensure integrity, the organization needs a control that can detect unauthorized alteration. Cryptographic hash functions are specifically designed to verify that data has not been modified. Timestamping helps with sequencing and timing, limiting access helps reduce risk of tampering, and archiving helps retention, but hashing is the strongest direct method for validating integrity. This answer is standard ISACA-aligned control reasoning based on the security objective of integrity.

ISACA’s log-management guidance emphasizes the need for trustworthy, purposeful logging and monitoring. For log data to be trusted as evidence or for operations, it must be protected against undetected modification. Among the given choices, cryptographic hashing is the most effective direct mechanism for that purpose.

References (Official ISACA):

ISACA Journal, Log Management as an Enabler for Data Protection and Automated Threat Detection.

ISACA Journal, A Framework for SIEM Implementation.

The first step in an incident response plan is typically preparation12. However, among the options provided, validating the incident would be the first step. This involves confirming that a security event is actually an incident3. It’s important to verify the event to avoid wasting resources on false positives.

The most important aspect of an incident response management program is the ability to detect incidents in a timely and accurate manner. Without effective detection, the organization cannot respond to incidents, mitigate their impact, or prevent their recurrence. The alerting tools and incident responseteam are responsible for monitoring the IT environment, identifying anomalies or threats, and notifying the appropriate stakeholders.

References

ISACA CISA Review Manual, 27th Edition, page 255

What is an incident response plan? And why do you need one?

ISACA CISA Certified Information Systems Auditor Exam … - PUPUWEB

 The most effective control to protect information assets in a data center from theft by a vendor is to monitor and restrict vendor activities. A vendor may have legitimate access to the data center for maintenance or support purposes, but they may also have malicious intentions or be compromised by an attacker. By monitoring and restricting vendor activities, the organization can ensure that the vendor only performs authorized tasks and does not access or tamper with sensitive data or equipment. Issuing an access card to the vendor, concealing data devices and information labels, and restricting use of portable and wireless devices are also useful controls, but they are not as effective as monitoring and restricting vendor activities in preventing theft by a vendor. References:

CISA Review Manual, 27th Edition, page 3381

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