Which of the following must be included in a documented plan for securing Real-Time Communication?

The inclusion of risk mitigation strategies for data in transit in a documented plan for securing Real-Time Communication is crucial for several reasons. Real-Time Communication often involves the transfer of sensitive or critical information across various networks, making it essential to ensure that this data remains confidential and intact during transmission.

By incorporating risk mitigation strategies specific to data in transit, organizations can identify potential vulnerabilities and threats that could lead to unauthorized access or alteration of communication data. This might involve the implementation of encryption methods, secure communication protocols, and regular assessments of the network for potential security flaws. Addressing these risks is essential not only for compliance with NERC’s Critical Infrastructure Protection standards but also for maintaining the integrity of the information being communicated, ensuring that operational processes remain reliable and secure.

Other aspects, such as software updates, external vendor compliance checks, and staff training, are indeed important for overall cybersecurity but may not directly address the specific challenges associated with securing communication data in real-time scenarios. Therefore, focusing on risk mitigation for data in transit is the most relevant choice for this particular context.