Using IPv6 not only has the advantage of an increased number of usable IT addresses, but it also has several other improvements over the older IPv4. IPv6 offers more efficient routing that allows ISP’s to aggregate their networks’ prefixes into a single prefix and announces it to the IPv6 internet. IPv6 is also more efficient at packet processing due to its simplified packet header. Getting rid of the checksum also enables a faster-operating speed. Directed data flows are also beneficial due to supporting multicast, whereas IPv4 only supports broadcast. Another strength of IPv6 is the built-in address auto-configuration; this allows a host to generate its own address. There is excellent support for using new services by eliminating Network Address Translation (NAT.) Peer-to-peer networks are far easier to maintain and upgrades to VoIP and Quality of Service (QoS.) By far, the security of an IPv6 might be the most significant benefit it has. IPSec provides additional confidentiality, data integrity, as well as authentication in an IPv6. Overall, it is safe to say that IPv6 is vastly superior to an IPv4 in many areas and should be used whenever possible.

Source:

http://www.networkcomputing.com/networking/six-benefits-ipv6/1148014746

“Six Benefits of IPv6”. Networkcomputing.com. Network Computing. 08 June 2011. 31 Jan 2017.