TAILIEUCHUNG - Lecture Business data communications: Chapter 1 - Behrouz A. Forouzan

Chapter 1 - Introduction. This chapter addresses four issues: data communications, networks, protocols and standards, and standards organizations. First, we give a broad definition of data communications. We then define networks as a highway on which data can travel. We also discuss different types of protocols and the difference between protocols and standards. Then, we give a brief review of the standards organizations that we refer to throughout the book. Finally, we discuss network models. | Chapter 1 Introduction Understand the difference between telecommunications and data communications. List the components of a data communications system. Understand the need for a network and distinguish between different network types. Understand the difference between a protocol and a standard. After reading this chapter, the reader should be able to: OBJECTIVES OBJECTIVES (continued) Understand the duties of the layers in the OSI model. Understand the duties of the layers in the Internet model. Be able to compare the layers in the OSI and Internet model. Be familiar with standards organizations and their duties. DATA COMMUNICATIONS In computer information systems, data are represented by binary information units (or bits) produced and consumed in the form of 0s and 1s. Note: Figure 1-1 Data communications system components In data communications, a protocol is a set of rules (conventions) that governs all aspects of information communication. Note: NETWORKS Figure 1-2 .

• Quản trị mạng
• Business data communications
• Data communications
• Business data communications
• Data link layer
• Network criteria
• Data communications system
• Data communications networks
• Media access control
• Network models
• Network standards
• Application layer
• Application architectures
• Physical layer
• Digital transmission
• Network and transport layers
• Transport layers
• Local area networks
• Traditional ethernet
• Wireless local area networks
• Wireless LANs
• Backbone networks
• Backbone network architectures
• Circuit switched networks
• Wide area networks
• Network security
• Risk assessment
• Network design
• Traditional network design
• Network management
• Configuration management