The IPv6 main drivers for adoption are a large address space which does not require any Network Address Translation (NAT) anymore, a simpler header which should permit a more efficient switching and the Extension headers which allow adding any service at the Network Layer rather than the Transport Layer when needed. A great example of an application which benefits from the Extension headers is the IP Mobility which has been greatly optimized with IPv6.
The eradication of NAT is supposed to get us back to the Internet the way it was designed at the origin, before NAT was introduced as a workaround for address depletion. It will restore the end to end connectivity which will permit IPSec and Peer-to-Peer applications. This is a real benefit in terms of performances and new features for many Voice or Conferencing applications for instance where we will not have to communicate through a server like Skype.
NAT and Transition
But many people still resist against this change because they Read the rest of this entry »