In computing, ________ is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

In computing, ________ is a network security system that monitors and

1.	In computing, ________ is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
A.	Spyware
B.	Cookie
C.	Spam
D.	Firewall
Answer» E.