What is a logical protection method for securing cables and nonprogrammable communication?

The correct answer pertains to the concept of securing data transmission by ensuring that the information being communicated remains confidential and is protected from unauthorized access or interception. Encryption serves as a robust method for safeguarding the integrity and confidentiality of data as it travels across communication channels.

When implemented, encryption transforms readable data into a coded format that can only be deciphered by individuals or systems that possess the appropriate decryption key. This means that even if an unauthorized individual were to access the physical wires or communicate signals, they would be unable to make sense of the transmitted data without this key. This is particularly vital in a context where secured communication is essential for protecting critical infrastructure, as it provides a layer of security against potential threats or breaches.

Other methods mentioned, such as physical locks, enclosed cable trays, and manual monitoring, can contribute to physical security and protection of physical assets but do not inherently address the confidentiality and integrity of the data being transmitted over these cables. For communication purposes, especially in environments that require high levels of security, encryption stands out as an essential practice in mitigating risks associated with unauthorized access to information.