What does "transmitting" classified information entail?

Transmitting classified information refers to the act of sending or communicating classified material while ensuring that its security is upheld. This involves following specific protocols and using secure methods to protect the information from unauthorized access during transit. Maintaining the confidentiality, integrity, and availability of classified information is crucial to national security, and proper transmission ensures that sensitive data does not fall into the wrong hands.

Other choices focus on different aspects of handling classified information. For instance, storage pertains to how classified materials should be kept secure, while discussion with unauthorized personnel directly violates security protocols and could lead to unauthorized disclosures. Categorizing classified information, on the other hand, relates to how information is classified but does not cover the transmission aspect. Hence, the correct choice emphasizes secure transmission methods critical for protecting classified information.