There are many issues with IPv4 which leads to development of IPv6 protocol. Some of them are: Adress depletion Internet routing table expansion Lack of true end-to-end model (NAT in IPv4 necessary) Features of IPv6 Larger address space – IPv6 addresses are 128 bit. This number is so big that you can allocate every molecule  Full Article…

Interface identifiers (IDs) are used to uniquely identify interface on a link. To be unique on a link is a requirement. They can be unique also at a global scope. When interface ID is derived directly from the data link layer address of a interface, the scope is assumed to be globally unique. IDs are  Full Article…

Unicast – One to One Multicast – One to Many Anycast – new concept and means One to Nearest (based on routing) In IPv4 broadcasts caused problems like interupts in every node in network and in some cases triggering broadcast storms. BC is not anymore used in IPv6 instead multicast is used. IPv6 Global unicast  Full Article…