When identifying which servers are no longer required, reviewing server CPU usage trends is the most helpful approach. Monitoring the CPU usage over time provides insights into how actively a server is being utilized.
Servers with consistently low CPU usage may be candidates for consolidation or decommissioning. By analyzing CPU utilization patterns, IT management can make informed decisions about which servers can be retired without impacting performance or availability1.
References:
1.
ISACA. "Technical Guide on IT Migration Audit." 1(http://kb.icai.org/pdfs/PDFFile5b278a12a66758.
27269499.pdf)
2. Zapier. "IT audit: The ultimate guide [with checklist]." 2(https://zapier.com/blog/it-audit/)
3. ISACA. "CISA Certification | Certified Information Systems Auditor." 3(https://www.isaca.org
/credentialing/cisa)

The first step when conducting an IT risk assessment is to identify assets to be protected, which include hardware, software, data, processes, people, and facilities that support the business objectives and operations of an organization. Identifying assets to be protected helps to establish the scope and boundaries of the risk assessment, as well as the value and criticality of each asset. Identifying potential threats, assessing vulnerabilities, and evaluating controls in place are subsequent steps in the risk assessment process that depend on the identification of assets to be protected. References: CISA Review Manual (Digital Version), Chapter 2: Governance & Management of IT, Section 2.3: IT Risk Management

The stakeholder's role in automating data extraction and validation is to indicate which data elements are necessary to make informed decisions. The stakeholder is the person who has a vested interest in the outcome of the data analytics process and can provide the business context and requirements for the analysis. The stakeholder can help the data analyst to identify the relevant data sources, the key performance indicators (KPIs), and the expected results of the analysis.
References
What Is the Data Analysis Process? 5 Key Steps to Follow - G2
What's the Best Approach to Data Analytics? - Harvard Business Review
Weekly challenge 1 - GitHub: Let's build from here

The type of firewall that provides the greatest degree of control against hacker intrusion is an application level gateway. A firewall is a device or software that filters or blocks network traffic based on predefined rules or policies. A firewall can help protect an information system or networkfrom unauthorized access or attack by hackers or other malicious entities. An application level gateway is a type of firewall that operates at the application layer of the network model (layer 7), which is where user applications communicate with each other over the network. An application level gateway provides the greatest degree of control against hacker intrusion, by inspecting and analyzing the content and context of each network packet at the application level, such as protocols, commands, requests, responses, etc., and allowing or denying access based on specific criteria or conditions. An application level gateway can also perform additional functions such as authentication, encryption, caching, logging, etc., to enhance the security and performance of network traffic.
A circuit gateway is a type of firewall that operates at the transport layer of the network model (layer 4), which is where data are transferred between end points over the network. A circuit gateway provides a moderate degree of control against hacker intrusion by establishing a secure connection between two end points (such as client and server) and relaying network packets between them without inspecting or analyzing their content. A circuit gateway can also perform functions such as encryption, authentication, or address translation to improve the security and privacy of network traffic. A packet filtering router is a type of firewall that operates at the network layer of the network model (layer 3), which is where data are routed between different networks or subnets. A packet filtering router provides a low degree of control against hacker intrusion by examining the header of each network packet and allowing or denying access based on basic criteria such as source address, destination address, port number, protocol, etc. A packet filtering router can also perform functions such as routing, forwarding, or address translation to optimize the delivery and efficiency of network traffic. A screening router is a type of firewall that operates at the network layer of the network model (layer 3), which is where data are routed between different networks or subnets. A screening router provides a low degree of control against hacker intrusion by examining the header of each network packet and allowing or denying access based on basic criteria such as source address, destination address, port number, protocol, etc. A screening router can also perform functions such as routing, forwarding, or address translation to optimize the delivery and efficiency of network traffic.