When an insurance portal crashes during data download, which part of the CIA triad is violated?

The correct choice in this scenario is availability. The CIA triad represents three core principles of information security: Confidentiality, Integrity, and Availability. Availability refers to the ability of authorized users to access information and resources when needed.

When the insurance portal crashes during a data download, it means that users are unable to access the service or data they require at that moment. This disruption directly impacts the availability of the portal, as it cannot provide its services to users, thus violating the principle of availability.

In contrast, while integrity focuses on ensuring that data is accurate and unaltered, and confidentiality pertains to protecting sensitive information from unauthorized access, those aspects are not directly affected by the portal crash in this context. Compliance, on the other hand, relates to adhering to laws and regulations but is also not relevant to the availability issue presented in this situation.