TAILIEUCHUNG - Practical TCP/IP and Ethernet Networking- P53

Practical TCP/IP and Ethernet Networking- P53: The transmitter encodes the information into a suitable form to be transmitted over the communications channel. The communications channel moves this signal as electromagnetic energy from the source to one or more destination receivers. The channel may convert this energy from one form to another, such as electrical to optical signals, whilst maintaining the integrity of the information so the recipient can understand the message sent by the transmitter | 242 Practical TCP IP and Ethernet Networking TCP IP based factory automation Schneider Automation http Richard Hirschmann Gmbh http Allen-Bradley http Thin servers LANTronix http Web compatible SCADA systems WizNet http Java RCS-7 Java http 16 Installing and troubleshooting Ethernet systems Objectives When you have completed study of this chapter you should be able to Define the functions of various types of network driver software Describe the parameters which need to be set for a network card to function correctly Determine how network cards are configured under the plug and play and PCMCIA architectures Specify the uses for a protocol analyzer Networkdrivers Networkdrivers The network driver is a program used to provide an interface between the network card and the higher-level protocols. It spans the data link and network layers of the OSI model as shown in Figure . The network driver needs to match the specific hardware configuration of the network card such as its addresses of I O ports control and status registers etc. Ethernet cards use the same IEEE protocol so they can communicate with one another but each needs a unique driver because of the different vendor hardware implementations. Compatibility and usage The network driver must also be compatible with the appropriate network operating system protocols in the network transport and session layers that are used to send data 244 Practical TCP IP and Ethernet Networking across the network. In early systems changing from one network protocol to another . TCP IP to SPX IPX generally necessitated changing the network driver. The network operating systems communication protocols and their relationship to the OSI model are shown in Figure . Figure Network operating system drivers protocols Network card driver configuration The .

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