IT asset inventory is the process of tracking and managing the financial, physical, licensing, and contractual aspects of IT assets throughout their life cycle1. IT assets include hardware, software, and network components that an organization values and uses to achieve its objectives2. A complete and accurate IT asset inventory can help an organization to optimize its IT budget, reduce security risks, ensure compliance, and improve performance3.
One of the best controls to enable an organization to ensure a complete and accurate IT asset inventory is performing network scanning for unknown devices. Network scanning is the process of identifying and collecting information about the devices connected to a network, such as their IP addresses, operating systems, open ports, services, and vulnerabilities4. Network scanning can help an organization to:
Discover and inventory all the IT assets on the network, including those that are unauthorized, unmanaged, or hidden Detect and remove any rogue or malicious devices that may pose a threat to the network security or performance Update and verify the asset inventory data regularly and automatically, and alert on any changes or discrepancies Support the asset lifecycle management and maintenance activities, such as patching, upgrading, or retiring assets5 References = IT Asset Valuation, Risk Assessment and Control Implementation Model, ITAM: The ultimate guide to IT asset management, Navigating Security Threats with IT Inventory Management, Network Scanning - Wikipedia, 8 Best IT Asset Management Software (2024)

Monitoring the average time to complete tasks and monthly reporting of the findings during the month-end close process aligns with the definition of a Key Performance Indicator (KPI).
Understanding KPIs:
Performance Measurement:KPIs are used to measure how effectively a company is achieving its key business objectives. Monitoring the average time to complete tasks during the month-end close process provides a performance metric.
Tracking Efficiency:By reporting these findings monthly, management can track the efficiency and performance of the system load capabilities.
Specific Measure:
Task Completion Time:The average time to complete tasks is a specific, measurable indicator of performance.
It helps in understanding how well the system handles load and identifies areas for improvement.
Continuous Improvement:Regular monitoring and reporting encourage continuous improvement, which is a core aspect of using KPIs.
References:
According to ISACA's guidelines on performance measurement, KPIs are critical for tracking the efficiency and effectiveness of processes and systems. They provide tangible metrics that help in decision-making and performance improvement.

A risk map is the best method to ensure that the risk is measurable against the organization's risk appetite, as it is a graphical tool that displays the level and priority of risks based on their likelihood and impact, as well as other factors such as velocity, persistence, and urgency. A risk map can help to compare and communicate the risk levels across different business units, processes, and projects, and to align them with the organization's risk appetite and tolerance. A risk map can also help to identify the gaps and overlaps in risk management, and to support the decision making and resource allocation for risk response. A cause-and-effect diagram is a tool that helps to identify and analyze the root causes and consequences of a risk or a problem, but it does not measure the risk against the organization's risk appetite. A maturity model is a tool that helps to assess and improve the capability and performance of a process or a function, but it does not measure the risk against the organization's risk appetite. A technology strategy plan is a document that outlines the vision, goals, and objectives of the organization's use of information and technology, but it does not measure the risk against the organization's risk appetite. References = Risk and Information Systems Control Study Manual, Chapter 3: IT Risk Assessment, page 97.

A cyber intrusion is an unauthorized or malicious access to a computer system or network by an attacker. A cyber intrusion can compromise the confidentiality, integrity, or availability of the system or network, as well as the data and services that it hosts. A cyber intrusion can also cause damage, disruption, or theft to the organization or its stakeholders. One of the best ways to prevent cyber intrusion is to strengthen vulnerability remediation efforts, which means to identify and fix the weaknesses or flaws in the system or network that can be exploited by the attackers. Vulnerability remediation efforts can include conducting regularvulnerability assessments, applying security patches and updates, configuring security settings and policies, and implementing security controls and measures. By strengthening vulnerability remediation efforts, the organization can reduce the attack surface and the likelihood of cyber intrusion, as well as enhance the resilience and protection of the system or network. The other options are not the best recommendations for preventing cyber intrusion, although they may be helpful and complementary. Establishing a cyber response plan is a technique to prepare for and respond to a cyber incident, such as a cyber intrusion, by defining the roles, responsibilities, procedures, and resources that are needed to manage and recover from the incident.
However, a cyber response plan is a reactive and contingency measure, while strengthening vulnerability remediation efforts is a proactive and preventive measure. Implementing data loss prevention (DLP) tools is a technology that tries to detect and stop sensitive data breaches, or data leakage incidents, in an organization.
DLP tools can help to protect the data from being disclosed to an unauthorized person, whether it is deliberate or accidental. However, DLP tools do not prevent cyber intrusion itself, as they only focus on the data, not the system or network. Implementing network segregation is a method to divide a network into smaller segments or subnetworks, each with its own security policies and controls. Network segregation can help to isolate and contain the impact of a cyber intrusion, as well as to limit the access and movement of the attackers within the network. However, network segregation does not prevent cyber intrusion from occurring, as it does not address thevulnerabilities or flaws in the system or network. References = CRISC Review Manual, pages 164-
1651; CRISC Review Questions, Answers & Explanations Manual, page 902; What Are Security Controls? - F53; Assessing Security Controls: Keystone of the Risk Management ... - ISACA4