Which classification level is the highest?

The classification level of Top Secret represents the highest level of sensitive information within the classification system. Information marked as Top Secret is deemed to be extremely sensitive, and its unauthorized disclosure could cause exceptionally grave damage to national security. This classification is used for information that requires the highest degree of protection due to the serious implications it could have if revealed.

In contrast, Confidential and Secret classifications represent lower levels of sensitivity. Confidential information may cause damage to national security if disclosed, while Secret information would cause serious damage. The Internal classification, often used in a business or organizational context rather than government security, typically does not carry the same level of risk associated with national security implications. Thus, Top Secret is distinctly recognized as the most sensitive level, necessitating the most stringent protective measures.