Revision Question on Subnet Mask

1.If a host on a network has the address 172.16.45.14/30, what is the address of the subnetwork in which this host belongs to?

A. 172.16.45.0
B . 172.16.45.4
C. 172.16.45.8
D. 172.16.45.12
E. 172.16.45.18

Answer: D