Chapter 1:roadmap 1.1 what is the Internet? 1.2 network edge end systems,access networks,links 1.3 network core packet switching,circuit switching,network structure 1.4 delay,loss,throughput in networks 1.5 protocol layers,service models 1.6 networks under attack:security 1.7 history Introduction 1-10Introduction Chapter 1: roadmap 1.1 what is the Internet? 1.2 network edge  end systems, access networks, links 1.3 network core  packet switching, circuit switching, network structure 1.4 delay, loss, throughput in networks 1.5 protocol layers, service models 1.6 networks under attack: security 1.7 history 1-10