How to find a Unicast

[rjmari]

Which of the following could be a unicast?
A. 10.3.1.27/30
B. 255.255.255.255
C. 172.16.128.255/18
D. 192.168.10.48/29

How do you do the calculation to get the answer?

 

[PhilFrisbie]

Sigh! Re-look at your class notes for the proper answer