CHAPTER 9 COMMUNICATIONS 1934 CIRCUITS 1 The first section 计算机网络 2 Exercises 3 Online lect Department of Computer Networking Application
Department of Computer Networking Application CHAPTER 9 COMMUNICATIONS CIRCUITS 1 The first section 2 Exercises 3 Online lecture
Chapter 9 Communications Circuits 9.1 INTRODUCTION 9.2 COMMUNICATIONS CIRCUITS The physical connection between two or more points used for the purpose of communicating is called a line or circuit A link is a segment of a circuit between two points a node is a functional unit that connects two transmission links or lines www.gxmu.edu.cn
Chapter 9 Communications Circuits 9.1 INTRODUCTION 9.2 COMMUNICATIONS CIRCUITS The physical connection between two or more points used for the purpose of communicating is called a line or circuit. A link is a segment of a circuit between two points. A node is a functional unit that connects two transmission links or lines. www.gxmu.edu.cn
Chapter 9 Communications Circuits Node Server PC Nodes Figure 9-1 Links are segments of a circuit Nodes connect links or lines or may be an end point on a link www.gxmu.edu.cn
Figure 9-1 Links are segments of a circuit. Nodes connect links or lines or may be an end point on a link. www.gxmu.edu.cn Chapter 9 Communications Circuits
Chapter 9 Communications Circuits 9.2 COMMUNICATIONS CIRCUITS a channel is a subdivision of a circuit and is a one way path for communicating. a data circuit is sometimes divided into two channel: data channel and control channel The data channel is called the forward channeland the control channel is the reverse channel www.gxmu.edu.cn
9.2 COMMUNICATIONS CIRCUITS A channel is a subdivision of a circuit and is a one way path for communicating. A data circuit is sometimes divided into two channel:data channel and control channel. The data channel is called the forward channel,and the control channel is the reverse channel. www.gxmu.edu.cn Chapter 9 Communications Circuits
Chapter 9 Communications Circuits 9.3 THE ENVIRONMENTIN WHICH CIRCUITS OPERATE LAN WAN 9.4 TYPES OF CIRCUITS 9.4.1 Point-to-Point circuit a point-to-point circuit connects two and only two nodes. www.gxmu.edu.cn
9.3 THE ENVIRONMENT IN WHICH CIRCUITS OPERATE LAN WAN 9.4 TYPES OF CIRCUITS 9.4.1 Point-to-Point Circuit A point-to-point circuit connects two and only two nodes. www.gxmu.edu.cn Chapter 9 Communications Circuits