“Fun” internet appliances Web-enabled toaster + weather forecaster IP picture frame Tweet-a-watt: monitor energy use Slingbox: watch, control cable TV remotely Internet refrigerator Internet phones Introduction 1-5 What’s the Internet: “nuts and bolts” view PC  millions of connected mobile network server computing devices: wireless  hosts = end systems global ISP laptop smartphone  running network apps home  communication links network regional ISP wireless  fiber, copper, links radio, satellite wired links  transmission rate: bandwidth  Packetswitches: forward router packets (chunks of data) institutional network  routers and switches Introduction 1-4 Ross, All Rights Reserved Introduction 1-1Ĭhapter 1: introductionour goal: overview: get “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, throughput example  security  protocol layers, service models  history Introduction 1-2Ĭhapter 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 1-3

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