What does the term critical infrastructure refer to?

The term critical infrastructure refers to systems and assets that are vital to national security, public health, and safety, as well as economic and national public well-being. This encompasses a wide range of sectors, including utilities (like water and electricity), transportation systems, healthcare facilities, and communication networks. The functionality and security of these infrastructures are essential for the nation’s overall resilience and ability to respond to emergencies or crises.

Options that mention specific categories, such as internet security or surveillance, are too narrow and do not capture the comprehensive nature of critical infrastructure. While private sector resources can be part of critical infrastructure, they are included within the broader context of systems that are vital to the country's wellbeing. Thus, defining critical infrastructure as a whole encompasses far more than any single aspect, reinforcing the importance of its broad and integral role in maintaining national stability and security.