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Network Communications Technology

Network Communications Technology. Chapter 21 Network Operating Systems (NOS). MS DOS. BIOS. Hardware ( Disk drive ,printer. Keyboard, motherboard). MS DOS and the BIOS. Basic Input/Output System Firmware in ROM HW initialize and test Hardware control routines

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Network Communications Technology

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  1. Network Communications Technology Chapter 21Network Operating Systems(NOS)

  2. MS DOS BIOS Hardware ( Disk drive ,printer Keyboard, motherboard) MS DOS and the BIOS • Basic Input/Output System • Firmware in ROM • HW initialize and test • Hardware control routines • Establish a low-level API • Bootstrap • MS DOS • Written for IBM (PC-DOS) • Establishes a higher-levelAPI for application programs Figure 21.1

  3. NetBIOS and NOS Firmware on the NIC Figure 21.2

  4. Internet Application Telnet, FTP and Ping Application level Network Neighborhood RAS WINS DHCP NT File System Drivers Redirectors WinSocket Driver Named Pipe Mail Slot NetBIOS Driver Server TDI Transport Drive Interface (TDI) Transport layer NWLink TCP/IP NetBEUI DLC NDIS Network Interface Drive Specification (NIDS) Network Interface Drivers Network Interface Layer Network Interface Card ( NIC) Windows NT Communication Model Figure 21.3

  5. Application Application RPC Application NetWare Core Protocol Presentation NetBIOS Emulator NetWare Shell RPC Session IPX SPX Transport Network ODI NDIS Link LAN Drivers Physical Ethernet Token Ring FDDI others Netware and OSIReference Model Figure 21.4

  6. NetWare Communication Data Base Services Services File System NetWare Modular Bus File and Print Store and Forward Disk Drivers Services Services Netware Loadable Models Figure 21.5

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