Final answer:
The good practice to protect classified information among the given options is C. Regularly review and update security protocols, as it ensures that the security measures are current and effective against new and evolving threats.
Step-by-step explanation:
Protecting classified information is pivotal in both governmental and private sectors to ensure national security, business integrity, and personal privacy. When considering the best practices to protect such sensitive data, it's important to evaluate options that not only secure information but also remain up-to-date with evolving threats. Therefore, the answer to the question: 'Which of the following is a good practice to protect classified information?' is C. Regularly review and update security protocols.
Assuming open storage is permitted in secure facilities is a risky approach, as it may not consider the nuanced differences in security needs for various classifications of data. Implementing strict access controls is important, but they should not be without limitations as this can hinder legitimate operations and may not be scalable or flexible. Disregarding encryption methods in communications greatly increases the risk of unauthorized interception and access to sensitive information.
To effectively protect classified information, it is crucial to regularly review and update security protocols. This includes initial risk assessments, routine checks, updating security measures to combat new threats, ongoing employee training, and ensuring that all protocols are adhered to. Security is an ever-evolving field, and what works today may not be sufficient tomorrow, making continuous updates and reviews necessary.