Exploring the Need for IPv6
IPv4 is stable and fully developed IP; however, due to scarcity of IPv4 address space, IPv4 is not feasible. IPv4 provides approximately 232 (4 billion) unique IP addresses for use. Today, approximately 5 to 6 percent 1Pv4 IP addresses are left. To overcome this problem, IPv6 is introduced. This IP version provides 2128 unique IP addresses to fulfill future needs. IPv6 also provides a number of other features, such as required support for advanced security, simplified processing, and support for network mobility.