Chapter 1 Introduction overview OBJECTIVES Explain what a Explain the terms Describe the network is communications.t history of elecommunication s and network networks www.gxmu.eau.cnwww.gxmu.edu.cn OBJECTIVES Chapter 1 Introduction overview 1 Explain what a network is ; 2 Explain the terms communications,t elecommunication s,and network; 3 Describe the history of networks;