LARGER ADDRESS SPACE FOR GLOBAL REACHABILITY AND SCALABILITY

The availability of an almost unlimited number of IP addresses is the most compelling benefit of implementing IPv6 networks. Compared to IPv4, IPv6 increases the number of address bits by a factor of 4, from 32 bits to 128 bits. The 128 bits provide approximately 3.4x1038 addressable nodes, enough to allocate about 1030 addresses per person on this planet. Figure 1 shows the general format of an IPv6 address.

Figure 1: IPv6 Address Format

 The ability to provide a unique address for each network device enables end-to-end reachability, which is especially important for residential IP telephony. IPv6 also provides full support for application protocols without requiring special processing at the edges of the networks, eliminating the problems associated with NAT.

FEATURES AND BENEFIT OF USING IPV6

In addition to meeting the anticipated future demand for globally unique IP addresses. IPV6 provides the following benefits to network and IT professional.

• Larger address space for global reachability  and scalability.
• Simplified header  format for efficient packet handling.
• Hierarchical network architecture for routing efficiency.
• Support for widely deployed routing protocols.
•  Autoconfiguration and plug-and-play support.
• Elimination of need for network address translation (NAT) and application’s layered gateway (ALG).
• Embedded security with mandatory IPSec implementation.
• Enhanced support for Mobile IP and Mobile Computing Devices.
• Increased number of multicast addresses.

I.P. V6

These details provides an introduction for those who are unfamiliar  and basics of ipv6 addresses and ipv6 services. The basics of IPv6 addressing are discussed, as are the various address types, address
assignment options, new DHCP(Dynamic Host Configuration Protocol ) features, and DNS(Domain Name System). Ipv6 is the latest version of Internet Protocol, its launches by CISCO SYSTEM.

An Overview

 Every device on the Internet must be assigned an IP-Address to connect or communicate with each other and all over the world. Due to increasing number of new devices and more address needing on internet also run out of Internet address of ipv4, the demand for more ip address to be seen. Pv6 is required because of the fast depletion of IPv4 addresses. IPv6 will enhance security of the TCP/IP stack, but most importantly increase the number of IP addresses available to use. This will essentially remove the need for network address translation (NAT).

What is IPv6

IPv6 is the sixth revision to the Internet Protocol and the successor to IPv4. It functions similarly to IPv4 in that it provides the unique, numerical IP addresses necessary for Internet-enabled devices to communicate. However, it does sport one major difference: it utilizes 128-bit addresses. IPv6 was developed by the Internet Engineering Task Force to pledge with the long-prepared for problem of Ipv4 consumption.

How does IPv6 solve this problem?

As previously stated, IPv6 utilizes 128-bit Internet addresses. Therefore, it can support 2^128 Internet addresses — 340,282,366,920,938,000,000,000,000,000,000,000,000 of them to be exact. That's a lot of addresses, so many that it requires a hexadecimal system to display the addresses. In other words, there are more than enough IPv6 addresses to keep the Internet operational for a very, very long time.