Which are these addresses?

Posted by: Pdfprep Category: 100-105 Tags: , ,

Assuming a subnet mask of 255.255.248.0, three of the following addresses are valid host addresses.

Which are these addresses? (Choose three.)
A . 172.16.9.0
B . 172.16.8.0
C . 172.16.31.0
D . 172.16.20.0

Answer: ACD