Internet of Things (IoT) is an emerging technology that refers to the network of devices, such as cameras, sensors, appliances, or vehicles, that can communicate and exchange data via the internet. IoT is frequently used for botnet distributed denial of service (DDoS) attacks, which are cyberattacks that aim to disrupt or disable a target's online services by overwhelming them with traffic from multiple sources. IoT devices are often unsecured, unpatched, or misconfigured, which makes them vulnerable to being infected by malware and controlled by attackers. Attackers can use IoT devices to create large and powerful botnets that can launch DDoS attacks against various targets, such as websites, servers, or networks. According to the CRISC Review Manual 2022, IoT is one of the key emerging technologies that pose new IT risks, including DDoS attacks1.
According to the CRISC Review Questions, Answers & Explanations Manual 2022, IoT is the correct answer to this question2. According to the web search results, IoT devices are commonly used for botnet DDoS attacks, such as the Mirai botnet, the Emotet botnet, and the BoT-IoT dataset345.

A review of a third-party vendor is a process that involves examining and evaluating the performance, quality, and compliance of the vendor that provides a product or service to the organization1. A review of a third-party vendor can help to identify and address the risks and issues that may arise from the vendorrelationship, such as data breaches, service disruptions, contract violations, or reputation damage2.
Following a review of a third-party vendor, it is most important for an organization to ensure that the results of the review are accurately reported to management, as this will enable the management to make informed and timely decisions and actions based on the findings and recommendations of the review. Accurate reporting of the results of the review will also help to establish and maintain the trust and transparency between the organization and the vendor, and to demonstrate the accountability and responsibility of the organization for its vendor risk management3. Identified findings are reviewed by the organization, results of the review are validated by internal audit, and identified findings are approved by the vendor are not the most important things to ensure following a review of a third-party vendor, as they do not provide the same level of impact and value as accurate reporting of the results of the review. Identified findings are reviewed by the organization is a process that involves analyzing and interpreting the outcomes and implications of the review of a third-party vendor, and determining the appropriate risk responses and actions to address the findings4.
This is an important step in the vendor risk management process, but it is not the most important thing to ensure following a review of a third-party vendor, as it does not communicate or inform the management or the vendor of the results of the review. Results of the review are validated by internal audit is a process that involves verifying and confirming the accuracy and reliability of the review of a third-party vendor, and providing assurance and advice on the adequacy and effectiveness of the vendor risk management. This is an important step in the vendor risk management process, but it is not the most important thing to ensure following a review of a third-party vendor, as it does not report or share the results of the review with the management or the vendor. Identified findings are approved by the vendor is a process that involves obtaining the consent and agreement of the vendor on the outcomes and recommendations of the review of a third-party vendor, and ensuring their cooperation and compliance with the risk responses and actions. This is an important step in the vendor risk management process, but it is not the most important thing to ensure following a review of a third-party vendor, as it does not report or inform the management of the results of the review. References = 1: The guide to third-party vendor reviews - TerraTrue HQ | TerraTrue2: 4 Tips For Organizations To Evaluate Third-Party Vendors - Forbes Advisor3: Vendor Risk Management: Best Practices for 2023 - Venminder4: [Risk and Information Systems Control Study Manual, Chapter 3: Risk Response, Section 3.1: Risk Response Options, pp. 113-115.] : [IT Risk Resources | ISACA] : Who Is Considered a Third Party or Vendor? - Venminder : [Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Assessment, Section 2.1: Risk Identification, pp. 57-59.] : [Risk and Information SystemsControl Study Manual, Chapter 4: Risk and Control Monitoring and Reporting, Section 4.2: Risk Monitoring, pp. 189-191.] :
[Risk and Information Systems Control Study Manual, Chapter 5: Information Systems Control Design and Implementation, Section 5.1: Control Design, pp. 233-235.] : [Risk and Information Systems Control Study Manual, Chapter 5: Information Systems Control Design and Implementation, Section 5.2: Control Implementation, pp. 243-245.] : [Risk and Information Systems Control Study Manual, Chapter 5:
Information Systems Control Design and Implementation, Section 5.3: Control Monitoring and Maintenance, pp. 251-253.]

Preventive controls are the best types of controls to minimize the risk associated with a vulnerability, because they aim to avoid or reduce the occurrence of a threat or an exploit. Preventive controls can include physical, technical, or administrative measures, such as locks, firewalls, encryption, policies, training, or backup.
Preventive controls can also involve eliminating or substituting the source of the vulnerability, such as outdated software or hardware.
References
*ISACA CRISC Review Manual, 7th Edition, Domain 3: Risk Response, Section 3.2.1: Control Types
*Hazard Controls - Princeton University
*Risk Control | Techniques and Importance of Risk Control - EDUCBA

The first course of action for an organization that has received notification that it is a potential victim of a cybercrime that may have compromised sensitive customer data is to invoke the incident response plan. An incident response plan is a set of procedures and guidelines that defines the roles and responsibilities of the incident response team, the communication and escalation channels, the incident identification and classification criteria, the incident containment and eradication strategies, the incident recovery and restoration activities, and the incident documentation and reporting requirements. Invoking the incident response plan as soon as possible is crucial to minimize the damage and disruption caused by the cybercrime, to preserve the evidence and facilitate the investigation, and to comply with the legal andregulatory obligations. The other options are not the first course of action, although they may be subsequent or concurrent steps in the incident response process. Determining the business impact is a part of the incident assessment and prioritization phase, which helps to evaluate the severity and scope of the incident and to allocate the appropriate resources and actions. Conducting a forensic investigation is a part of the incident analysis and evidence collection phase, which helps to identify the source and cause of the incident and to support the legal and disciplinary actions. Invoking the business continuity plan (BCP) is a part of the incident recovery and restoration phase, which helps to resume the normal operations and services and to mitigate the adverse effects of the incident. References = The National Cyber Incident Response Plan (NCIRP), Cyber Incident Response Plan | Cyber.gov.au, [Cyber Incident Response: A Framework for Preparation and Success]
, [Cyber Incident Response Plan: How to Create One for Your Business]