James is the lone IT technician for a small advertising agency in the Midwest. He oversees three servers and fifteen workstations all running Windows operating systems. James just got back from a Hacker Halted conference and is now very concerned about the security of his network. Previously he thought that no one would be interested in his small company’s data, but now he
thinks otherwise. His budget is very limited and he cannot afford any kind of commercial IDS or IPS system.
James is looking for a freeware or easy-to-use open source program that will help him to detect port scans on his workstations and servers.
What should James use?

A.
GFI LANGuard

B.
Snort

C.
Nmap

D.
Genius