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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

Network Communications Technology

Chapter 21Network Operating Systems(NOS)


Ms dos and the bios

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


Netbios and nos

NetBIOS and NOS

Firmware on the NIC

Figure 21.2


Windows nt communication model

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


Netware and osi reference model

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


Netware loadable models

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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