Which of the following are the most likely causes of a virus attack? Each correct answer represents a
complete solution. Choose all that apply.

A.
Installing an application from an unreliable source

B.
Using a floppy, a compact disk, or a pen drive from an unreliable source

C.
Downloading a file from an unknown Website

D.
Installing a .DLL file from an unreliable source

Explanation:

The following are the most likely causes of a virus attack:
Using a floppy, a compact disk, or a pen drive from an unreliable source
Downloading file(s) from an unknown Website
Installing an application or a .DLL file from an unreliable source
A virus is a program code that is written for the destruction of data. This program requires writable
media. A virus can infect boot sectors, data
files, and system files. A computer virus passes from one computer to another on the network in the
same way as a biological virus passes
from one person to another.