ISC Exam Questions

Which choice below is NOT one of the legal IP address ranges specified by RFC1976 and reserved by th

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).