Which of the following is an ip address that is private (i.e. reserved for internal networks, and not a
valid address to use on the internet)?

A.
172.5.42.5

B.
172.76.42.5

C.
172.90.42.5

D.
172.16.42.5

Explanation:

The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP
address space for private Internets – 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and
192.168.0.0 to 192.168.255.255- that are known as “global non-routable addresses.”” Pg. 94 Krutz:
The CISSP Prep Guide.