E. CLASS B NETWORKS IMPLY 16 NETWORK BITS; THE MASK IMPLIES 7 HOST...
4.
E. Class B networks imply 16 network bits; the mask implies 7 host bits (7 binary 0s in
the mask), leaving 9 subnet bits. 2
9
yields 512 subnets, and 2
7
– 2 yields 126 hosts
per subnet.