Network Security » Classful Addressing
Last Address is –

A. 180.8.255.255.
B. 180.8.255.0.
C. 180.12.0.255.
D. 180.9.255.255.

Explanation: Keep the leftmost 16 bits and set the rightmost 16 bits all to 1s. Last address = 180.8.255.255.