Final answer:
A protocol is a set of rules to implement and control communication between systems. NIST SP 800-82 Rev. 2 provides guidelines for securing industrial control systems.
Step-by-step explanation:
A set of rules (formats and procedures) to implement and control some type of association (that is, communication) between systems is known as a protocol. NIST SP 800-82 Rev. 2 is a document that provides guidelines for securing industrial control systems. It covers topics like network architecture, authentication, access control, and incident response.