TCP/IP Offload

To increase its performance, the Microsoft TCP/IP transport can offload tasks or connections to a NIC that has the appropriate TCP/IP-offload capabilities.

Beginning with Windows Vista, the Windows operating system supports the following TCP/IP offload services:

  • Checksum tasks

  • Applications Internet protocol security (IPsec) offload version 1

  • IPsec offload version 2

  • Large send offload version 1

  • Large send offload version 2

  • Connection offload

The TCP/IP transport that is provided beginning with Windows Vista supports TCP/IP offload services for both IPv4 and IPv6 packets.

NDIS 6.0 and later miniport drivers support TCP/IP offload services in a multiple-protocol driver environment. Multiple NDIS 6.0 and later protocol drivers that are bound to a TCP/IP offload-capable miniport adapter can configure TCP/IP offload services.

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