Chapter 1:introduction our goal: overview: gget“feel"and what's the Internet? terminology what's a protocol? *more depth,detail network edge;hosts,access net, physical media later in course network core:packet/circuit approach: switching,Internet structure ■use Internet as performance:loss,delay, example throughput security protocol layers,service models history Introduction 1-2Introduction Chapter 1: introduction our goal:  get “feel” and terminology  more depth, detail later in course  approach:  use Internet as example overview:  what’s the Internet?  what’s a protocol?  network edge; hosts, access net, physical media  network core: packet/circuit switching, Internet structure  performance: loss, delay, throughput  security  protocol layers, service models  history 1-2