《计算机英语》课件chapter work教学教材.ppt

Contents
Chapter 1 Introduction to Information Technology
Chapter 2 System Unit
Chapter 3 Input Devices
Chapter 4 Output Devices
Chapter 5 Secondary Storage
Chapter 6 System Software
Chapter 7 Application Software
Chapter munication System
Chapter work
Chapter 10
Chapter 11 merce and Security
Chapter 12 Professional Certification and Careers in Information Systems
Chapter work
Objective
After reading this chapter, you should be able to:
Know OSI reference model.
Know TCP/IP reference model.
work architecture.
Describe local area, metropolitan area, and wide works.

work is a group of puters.
work puters municate with each other and share resources and information.
Architecture
Network architecture describes how work is configured and what strategies are used.
Two works architectures:
Open System Interconnection Reference Model
TCP/IP Reference Model