How many total IP addresses are represented by the 255.255.255.0 netmask?

How many total IP addresses are represented by the 255.255.255.0 netmask?

A.
128

B.
256

C.
512

D.
1024

Explanation:

http://compnetworking.about.com/od/wirelessterms/g/255-255-255-0-subnet-mask.htm