Diffrence between Microsoft XP sp2 & sp3

1) Network Access Protection compatibility - This feature allows Windows XP machines to interact with the NAP feature in Windows Server 2008. This functionality is built into the RTM version of Windows Vista as well.

2) Product Key-less install option - As with Windows Vista, new XP with SP3 installs can proceed without entering a product key during Setup.

3) Kernel Mode Cryptographics Module - A new kernel module that "encapsulates several different cryptographic algorithms,".

4) "Black hole" router detection algorithm - XP gains the ability to ignore network routers that incorrectly drop certain kinds of network packets. This, too, is a feature of Windows Vista.

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