Ian Is Beginning His Studies Toward a Degree in Computer

Multiple Choice

Ian is beginning his studies toward a degree in computer security. He knows that he has a lot to learn and wants as solid a footing in the basics as he can get. He has asked you to come over and help him make sure he's got a good grasp of the fundamentals.
-Impressed with Ian's knowledge, you decide to test him further. You ask him what kind of software tool or program is most helpful in defending against necessity attacks. He replies: ____.

A) packet sniffer
B) script kiddie
C) ad blocker
D) secret key