4. a. Virus
a malicious program design to
replicate itself and transfer from
one computer to another (internet,
local networks, FDs, CDs, etc.).
5. b. Worm
a malicious program
transfers from one computer to
another by any types of means.
Example:
ILOVEYOU Worm
6. c. Trojan
a malicious program that
distinguishes a useful program,
but once downloaded or installed,
leaves your PC unprotected and
allows hackers to get
information.
7. d. Spyware
a program that runs in the
background without you knowing it
(thus called “spy”). It has the ability to
monitor what are you currently doing
and typing through key logging.