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This overview delves into the interplay between Network Interface Cards (NIC) and device drivers in client communication. NICs work in tandem with software drivers to manage hardware operations, implementing subnet layer protocols vital for efficient data transfer. Windows Communication is governed by NDIS, which ensures that incoming packets are routed to the appropriate protocol stack (TCP/IP, SPX/IPX, etc.) while managing outgoing packets seamlessly. Discover how NDIS optimizes network operations and ensures stable communication across various transport-layer protocols.
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Client Communication • NIC is Really • The physical hardware plus • Software: device driver • Upper-layer software talks to device driver • Together, implement subnet layer protocols NIC and Device driver Together handle PHY, MAC, LLC Device Driver NIC
Client Communication • Client PC has Multiple Transport-Internet Layer Protocol Stacks for Different Protocols • NDIS in Windows Governs their Communication with the Single NIC TCP SPX IP IPX NDIS
Client Communication • NDIS routes incoming packets to correct stack (IPX to SPX/IPX, etc.) TCP SPX IP IPX NDIS
Client Communication • NDIS feeds outgoing packets one at a time to the NIC TCP SPX IP IPX NDIS