Which
of the following uses public key cryptography to encrypt the contents of files?
A.
EFS
B.
DFS
C.
NTFS
D.
RFS
Explanation:
The Encrypting File System (EFS) on Microsoft Windows is a file system filter that
provides filesystem-level encryption and was introduced in
version 3.0 of NTFS. The technology enables files to be transparently encrypted to protect
confidential data from attackers with physical
access to the computer.EFS is enabled in all versions of Windows meant for professional use from Windows 2000 onwards.
However, since significant caveats exist
for its use, no files are encrypted by default and must explicitly be invoked by the user (in
organizational settings, encryption can also be
mandated through Group Policy).
Answer option B is incorrect. Distributed File System (DFS) is a set of client and server services that
allow an organization utilizing Microsoft
Windows servers to organize many distributed SMB file shares into a distributed file system. DFS
provides location transparency and
redundancy to improve data availability in the face of failure or heavy load by allowing shares in
multiple different locations to be logically
grouped under one folder, or DFS root.
Answer option C is incorrect. NTFS is an advanced file system designed for use specifically in
Windows NT, Windows 2000/2003, and Windows
XP operating systems. It supports file system recovery, large storage media, long file names, and
other features.
NTFS offers features such as disk quotas, distributed link tracking, compression, and mounted
drives. NTFS also offers security features, such
as encryption and file and folder permissions. These features are not available on FAT volumes.
Answer option D is incorrect. The Reiser file system is the preferred partition type for a Linux-only
computer. It is not used in a dual-booting
environment. The Reiser file system allows faster recovery from unexpected problems such as power
failure. It uses a faster and more secure
method of writing data to the hard drive.