Driving Microsoft to adopt the IPv6 protocol in Vista is the ability to enable "new application experiences." It meant being able to incorporate "richer collaboration," multiplayer gaming, or voice and video into applications.
I hate to break it to suckers who are reading that, but IPv6 isn't anything special, it's just a new way to address servers and can store a little more data that might make connections faster, although it's not likely that they'll implement the quality-of-service because everybody would start marking their packets as critical (I sure would). So there really isn't anything special about IPv6.
Hahaha. IPv6 is pretty old anyway, isn't it? By adopting it, what are they implying? That it's going to be the default Layer 3 protocol used? I know you can enable compatibility in XP...
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