Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge end systems, access networks, lInks 1.3 Network core a circuit switching, packet switching, network structure 1.4 Delay, loss and throughput in packet-switched networks 1.5 Protocol layers, service models 1.6 Networks under attack securi 1.7 History Introduction 1-3Introduction 1-3 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge ❑ end systems, access networks, links 1.3 Network core ❑ circuit switching, packet switching, network structure 1.4 Delay, loss and throughput in packet-switched networks 1.5 Protocol layers, service models 1.6 Networks under attack: security 1.7 History