What must Responsible Entities do for Transient Cyber Assets managed by them?

The correct answer is that Responsible Entities must use one or a combination of methods to mitigate malicious code risk associated with Transient Cyber Assets they manage. This requirement aligns with NERC CIP v7 standards, which mandate that entities protect their cyber assets, including transient ones, from potential threats and vulnerabilities that could compromise the Bulk Electric System (BES).

Transient Cyber Assets, such as laptops or USB drives used temporarily, are often a vector for introducing malicious code into more secure environments. Therefore, employing methods such as antivirus scans, secure configurations, or other protective measures is essential. By implementing these security measures, Responsible Entities can help ensure that transient assets do not pose a risk to the functions and integrity of the BES Cyber Systems.

In contrast, other options allow for inadequate or no security measures, which would be contrary to the intent of the CIP standards. For example, the idea of implementing no security measures or directly connecting transient assets without checks contradicts the focus on maintaining security and mitigating risks in the electricity sector. Storing transient assets without oversight would also undermine effective risk management practices, making it essential for Responsible Entities to actively manage and secure these assets.