SUCCESS OF IP:

 IP has accommodated dramatic modification since real design. But basic rules are still appropriate today. There are many new kinds of hardware.

SCALING:

 Scale is also dramatically modification. Size from a few tens to a few tens of millions of devices has been revolutionized. Data Speed has increased from 56Kbps to 1Gbps. Also there is an increased message size in system hardware.

MOTIVATION FOR CHANGE:

 One of the parameters, which motivated IP for modification is address space. The 32- bit address space gives for over a various networks. But most networks are class C and too small for several companies. 214 class B network addresses already almost terminated. The second parameter is kind of service, the IP gives. Different applications have different needs for delivery reliability and speed. Current IP has type of function that is not often implemented. Another factor for the motivation for modification is multicast.

NAME AND VERSION NUMBER:

 Preliminary versions of IP was known IP- Next Generation (IPng). There were various proposals and all known IPng. One name was chosen and it used next available version number i.e. 6. The result is IPV6.

NEW FEATURES:

 The new features of IPV6 are as given:

• IPV6 addresses are 128 bits.
• Header format is totally different.
• Additional information is saved in optional extension headers, followed by message.
• Flow quality and label of service allows video and audio applications to create appropriate connections.
• New features can be included more easily.