Classified networks are secure computer networks designed to store, process, and transmit sensitive or secret information. Typically used by government agencies, military organizations, and contractors, these networks employ advanced security measures such as encryption, strict access controls, and continuous monitoring to prevent unauthorized access or data breaches. Classified networks are segmented by security clearance levels, ensuring only authorized personnel can access specific types of information. Examples include networks used for national defense, intelligence operations, or diplomatic communications. Breaches of classified networks can have serious national security implications, so their protection is governed by rigorous standards and regulations.