Which of the following are the most likely causes of a virus attack?

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.
Downloading a file from an unknown Website

C.
Installing a .DLL file from an unreliable source

D.
Using a floppy, a compact disk, or a pen drive 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 WebsiteInstalling 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.