Which of the following statements are true about an IPv6 network? Each correct answer
represents a complete solution. Choose all that apply.

A.
For interoperability, IPv4 addresses use the last 32 bits of IPv6 addresses.

B.
It increases the number of available IP addresses.

C.
It uses longer subnet masks than those used in IPv4.

D.
It provides improved authentication and security.

E.
It uses 128-bit addresses.

Explanation:

IP addressing version 6 (IPv6) is the latest version of IP addressing. IPv6 is designed to solve
many of the problems that were faced by IPv4, such as address depletion, security, autoconfiguration, and extensibility. With the fast increasing number of networks and the expansion of
the World Wide Web, the allotted IP addresses are depleting rapidly, and the need for more
network addresses is arising. IPv6 solves this problem, as it uses a 128-bit address that can
produce a lot more IP addresses. These addresses are hexadecimal numbers, made up of eight
octet pairs. An example of an IPv6 address is 45CF: 6D53: 12CD: AFC7: E654: BB32: 543C:
FACE.
Answer option C is incorrect. The subnet masks used in IPv6 addresses are of the same length as
those used in IPv4 addresses.