Final answer:
EFS and BitLocker are technologies used to secure data on disk drives; EFS encrypts files, while BitLocker encrypts the entire drive. VPN and IPsec, however, are used for securing network transmissions.
Step-by-step explanation:
To secure data on disk drives, certain technologies are specifically designed for data encryption and protection. Here, we'll explore the choices given and determine which can be used for this purpose.
- EFS (Encrypting File System) is a component of Windows operating systems that enables files to be stored in an encrypted format on the hard drive. EFS is especially useful for securing sensitive data at the file level.
- BitLocker is a full disk encryption feature included in certain versions of Windows. It encrypts the entire drive, which helps protect the data on the drive from unauthorized access, especially in the case of theft or loss.
The other options mentioned, such as VPN (Virtual Private Network) and IPsec (Internet Protocol Security), are primarily used to secure data transmission over a network and are not used for encrypting data on disk drives.