Question $2$: Match each of the following terms to its definition:

I. packet filtering

II$.$ zombie

III. firewall

IV$.$ network address translation

V$.$ packet sniffer

A$.$ technique of assigning hidden internal IP addresses to protect a network against hackers

B$.$ method for selectively allowing certain requests to access a port

C$.$ hardware or software for protecting computers from hackers

D$.$ a computer controlled by a hacker

E$.$ program used by hackers to look at individual packets as they travel on the Internet