Recurring training is a type of security awareness training that is conducted periodically to refresh and update the knowledge and skills of the users. Recurring training can help improve the situational and environmental awareness of existing users as they transition from remote to in-office work, as it can cover the latest threats, best practices, and policies that are relevant to their work environment. Modifying the content of recurring training can ensure that the users are aware of the current security landscape and the expectations of their roles. References = CompTIA Security+ Study Guide with over 500 Practice Test Questions: Exam SY0-701,
9th Edition, Chapter 5, page 232. CompTIA Security+ (SY0-701) Certification Exam Objectives, Domain 5.1, page 18.

Side loading refers to the process of installing applications on a device from outside the official app store, which can introduce security vulnerabilities by bypassing standard app validation processes.References:
Security+ SY0-701 Course Content, Security+ SY0-601 Book.

Side loading is the process of installing software outside of a manufacturer's approved software repository.
This can expose the device to potential vulnerabilities, such as malware, spyware, or unauthorized access.
Side loading can also bypass security controls and policies that are enforced by the manufacturer or the organization. Side loading is often done by users who want to access applications or features that are not available or allowed on their devices. References = Sideloading - CompTIA Security + Video Training | Interface Technical Training, Security+ (Plus) Certification | CompTIA IT Certifications, Load Balancers - CompTIA Security+ SY0-501 - 2.1, CompTIA Security+ SY0-601 Certification Study Guide.

Rules of engagement are the detailed guidelines and constraints regarding the execution of information security testing, such as penetration testing. They define the scope, objectives, methods, and boundaries of the test, as well as the roles and responsibilities of the testers and the clients. Rules of engagement help to ensure that the test is conducted in a legal, ethical, and professional manner, and that the results are accurate and reliable. Rules of engagement typically include the following elements:
* The type and scope of the test, such as black box, white box, or gray box, and the target systems, networks, applications, or data.
* The client contact details and the communication channels for reporting issues, incidents, or emergencies during the test.
* The testing team credentials and the authorized tools and techniques that they can use.
* The sensitive data handling and encryption requirements, such as how to store, transmit, or dispose of any data obtained during the test.
* The status meeting and report schedules, formats, and recipients, as well as the confidentiality and non- disclosure agreements for the test results.
* The timeline and duration of the test, and the hours of operation and testing windows.
* The professional and ethical behavior expectations for the testers, such as avoiding unnecessary damage, disruption, or disclosure of information.
Supply chain analysis, right to audit clause, and due diligence are not related to the terms of a test with a third- party penetration tester. Supply chain analysis is the process of evaluating the security and risk posture of the suppliers and partners in a business network. Right to audit clause is a provision in a contract that gives one party the right to audit another party to verify their compliance with the contract terms and conditions. Due diligence is the process of identifying and addressing the cyber risks that a potential vendor or partner brings to an organization.
References = https://www.yeahhub.com/every-penetration-tester-you-should-know-about-this-rules-of- engagement/
https://bing.com/search?q=rules+of+engagement+penetration+testing