CCNA IPV6

                                        IP VERSION 6

IP version 6 is 128 bit logical address written in Hexadecimal . It has large number of IP address range which will help to overcome problems due to unavailability of IP version 4. We were using NAT to use private IP in public network. If we use IPv6. We don;t need to configure NAT. We don't need of sub netting  because IP v6 support any cast place of broadcast.

ex.   2000:0000:0abc:0124:ec12:1240:4124:1234   /64

 In given example 32 digit is used which is in hexadecimal. A group of 4 digit is known as chunk which is equal to 16 bit.   (f=15, where 15 is equal to (1111) 4 digit of binary ). Total 8 chunk is available in IPv6 . Then 16*8= 128bit.

In given example starting 48 bit is a global ID which is reserved . No one can change 48 bit. bit number 49 to 64 is Network ID. When we need to change NID ID we change it from 4th chunk.
Last 64 bit is for Host ID which will be unique for all networking devices. It uses 64 bit for host ID and 64 bit for NID .So we write /64 as a sub net prefix in place of sub net mask.

IP distributions.

     For example ..............