Which of the following best describes data in transit protection?

• A. TLS/SSL
• B. Disk encryption
• C. Password hashing
• D. Offline backups

Answer: (A)

Data in transit protection is about securing information as it moves across networks, guarding against eavesdropping, tampering, and impersonation. The standard way to achieve this is TLS/SSL, which encrypts the communication channel, provides data integrity checks, and authenticates the communicating parties. This is what protects you when you see HTTPS or secure email transport—the data is protected while it’s traveling between systems.

Disk encryption, by contrast, protects data at rest on storage devices, not while it’s being transmitted. Password hashing is about securely storing authentication credentials, not protecting data in transit. Offline backups involve copies stored separately and aren’t inherently about securing data in motion. Therefore, TLS/SSL best describes data in transit protection.