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 IP address 172.16.42.5 is contained in a class B reserved network, IANA reserved the 172.16.0.0
through 172.31.255.255 networks for internal use, this network its not routable in Internet and its
commonly used in intranets. Class B networks are used in mediumsized networks. In class B
networks, the two high order bits are always 10, and then remaining bits are used to define 16.384
networks, each with as many as 65.534 hosts attached. Examples of valid Class B networks include
Microsoft and Exxon.