Which choice below is NOT one of the legal IP address ranges specified
by RFC1976 and reserved by the Internet Assigned Numbers Authority
(IANA) for nonroutable private addresses?

A.
192.168.0.0 – 192.168.255.255

B.
127.0.0.0 – 127.0.255.255

C.
10.0.0.0 – 10.255.255.255

D.
172.16.0.0 – 172.31.255.255

Explanation:
The other three address ranges can be used for Network Address
Translation (NAT). While NAT is, in itself, not a very effective security
measure, a large network can benefit from using NAT with
Dynamic Host Configuration Protocol (DHCP) to help prevent certain
internal routing information from being exposed. The address
127.0.0.1 is called the loopback address. Source: Designing Network
Security by Merike Kaeo (Cisco Press, 1999).