New Features in XP SP3
For the most part, Microsoft is doing their best to avoid pulling Vista features into XP, with just a few exceptions. They are:
* Network Access Protection (NAP):
A new system in Vista and Windows Server 2008, this feature sets system "health" requirements to validate a computer's health before it allows that computer to connect to yours.
* "Black Hole" Router Detection:
This new feature detects when your router is silently losing or discarding packets and is intended to protect from such problems.