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TCP Offloading is a technique used to improve network performance by offloading some of the TCP/IP processing tasks from the CPU to specialized hardware or network interface cards (NICs). This allows the CPU to focus on other tasks, resulting in improved overall system performance.
In the Windows environment, TCP Offloading can be achieved through various technologies such as TCP Chimney Offload, Receive Side Scaling (RSS), and TCP Segmentation Offload (TSO). These technologies are designed to optimize network traffic and reduce CPU utilization.
TCP Chimney Offload, also known as TCP/IP Offload Engine (TOE), is a feature supported by some NICs that offloads TCP/IP processing tasks to the NIC itself. This feature can be enabled or disabled through the device driver settings or the Windows registry.
Receive Side Scaling (RSS) is another TCP Offloading technology available in Windows. It allows incoming network traffic to be distributed across multiple CPU cores, enabling parallel processing and improving network throughput. RSS can be configured through the network adapter settings in the Device Manager.
TCP Segmentation Offload (TSO) is a feature that allows the NIC to split large TCP packets into smaller ones, reducing the CPU overhead required for packet processing. TSO can be enabled or disabled through the network adapter settings.
Examples:
Enabling TCP Chimney Offload:
Configuring Receive Side Scaling (RSS):
Enabling TCP Segmentation Offload (TSO):