上海交通大学：《通信网络》课程PPT教学课件（Communication Networks）Introduction（主讲：叶通）

First generation of computer Networks Early 1960s: Aircraft Booking System Terminals

Communication Networks First Generation of Computer Networks • Early 1960s: Aircraft Booking System 12 Terminals Central Computer

Second Generation of Computer Networks Later 1960s to middle 1970s: ARPAnet

Communication Networks Second Generation of Computer Networks • Later 1960s to middle 1970s: ARPAnet 13

Third Generation of Computer Networks Later 1970s to 1980s: osi standard and TCP/IP Ethernet Token ring Ethernet

Communication Networks Third Generation of Computer Networks • Later 1970s to 1980s: OSI standard and TCP/IP 14 Router Ethernet Token Ring Ethernet

Fourth generation of Computer Networks 1990s-: Internet Age Ethernet Token Ring Internet Ethernet

Communication Networks Fourth Generation of Computer Networks • 1990s - : Internet Age 15 Ethernet Token Ring Ethernet Internet