What does the term 'dual control' refer to in Master Policy Rules?

The term 'dual control' in the context of Master Policy Rules refers specifically to the requirement that approval for certain actions must come from two separate users. This measure is put in place to enhance security by preventing a single individual from having unilateral control over sensitive actions, such as accessing privileged accounts or making significant changes within the system.

By requiring two individuals to agree before proceeding, dual control acts as a safeguard against unauthorized access or misuse of privileges. This is particularly important in scenarios where trust is critical, and the prevention of errors or malicious behavior is a priority.

The other options, while touch upon aspects of security or access, do not accurately capture the essence of 'dual control.' For example, simultaneous access by multiple users, passwords shared among team members, and monitoring sessions together do not inherently involve the necessity for consent or approval from two distinct individuals before an action is taken. Hence, option C is the most precise representation of what 'dual control' entails in Master Policy Rules.