Which of the following BEST protects the confidentiality of data being transmitted over a network?

Which of the following BEST protects the confidentiality of data being transmitted over a network?

• A. Data re-encapsulated in data packets with authentication headers.
• B. A digital hash is appended to all messages sent over the network.
• C. Network devices are hardened in compliance with corporate standards.
• D. Fiber-optic cables are used instead of copper cables.

Answer: (A)

The option that best protects the confidentiality of data being transmitted over a network is the first choice, which involves data being re-encapsulated in data packets with authentication headers. This method combines encapsulation of the data within secure packets and authentication, ensuring not only that the data remains confidential while being transmitted but also that it has not been altered in transit. In networking, encapsulation typically refers to placing data in a secure format that allows it to be transmitted safely across the network. This often involves encryption, which is crucial for maintaining confidentiality. The authentication headers further strengthen this by verifying the integrity and origin of the data, guarding against interception and potential tampering. This layered approach is essential for safeguarding data confidentiality. Other options focus on different security measures, such as hashing, device hardening, and using fiber-optic cables. While these strategies contribute to overall data security and integrity, they do not specifically address the confidentiality of data in transit to the same extent as the use of encrypted data packets with authentication headers. Hashing, for example, ensures data integrity but does not provide confidentiality since it does not encrypt the data. Device hardening improves security posture, and fiber-optic cables may reduce the risk of interception but do not themselves encrypt the data

The option that best protects the confidentiality of data being transmitted over a network is the first choice, which involves data being re-encapsulated in data packets with authentication headers. This method combines encapsulation of the data within secure packets and authentication, ensuring not only that the data remains confidential while being transmitted but also that it has not been altered in transit.

In networking, encapsulation typically refers to placing data in a secure format that allows it to be transmitted safely across the network. This often involves encryption, which is crucial for maintaining confidentiality. The authentication headers further strengthen this by verifying the integrity and origin of the data, guarding against interception and potential tampering. This layered approach is essential for safeguarding data confidentiality.

Other options focus on different security measures, such as hashing, device hardening, and using fiber-optic cables. While these strategies contribute to overall data security and integrity, they do not specifically address the confidentiality of data in transit to the same extent as the use of encrypted data packets with authentication headers. Hashing, for example, ensures data integrity but does not provide confidentiality since it does not encrypt the data. Device hardening improves security posture, and fiber-optic cables may reduce the risk of interception but do not themselves encrypt the data