Users report that after downloading several applications, their systems’ performance has
noticeably decreased. Which of the following would be used to validate programs prior to installing
them?

A.
Whole disk encryption

B.
SSH

C.
Telnet

D.
MD5

Explanation:
MD5 can be used to locate the data which has changed.
The Message Digest Algorithm (MD) creates a hash value and uses a one-way hash. The hash
value is used to help maintain integrity. There are several versions of MD; the most common are
MD5, MD4, and MD2.