Is national security the only factor in selecting transmission methods for classified information?

National security is indeed a crucial factor in selecting transmission methods for classified information, but it is not the only consideration. The transmission methods must balance multiple aspects, such as the sensitivity of the information, urgency of the transmission, potential risks associated with different mediums, reliability, and compliance with regulatory requirements.

Additionally, factors such as technological capabilities, accessibility for authorized personnel, cost-effectiveness, and the specific context or operational environment play significant roles in determining the most appropriate transmission method. In scenarios where time is of the essence, the urgency may dictate the use of certain methods even if they have lower security measures. Thus, the selection of transmission methods involves a comprehensive analysis beyond national security alone, incorporating a holistic view of how classified information can be securely and effectively communicated.