chapter1 - Chapter 1 Introduction Chapter 1: Introduction...

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Introduction 1-1 Chapter 1 Introduction Computer Networking: A Top Down Approach , 5 th edition. Jim Kurose, Keith Ross Addison-Wesley, April 2009. A note on the use of these ppt slides: We’re making these slides freely available to al (faculty, students, readers). They’re in PowerPoint form so you can add, modify, and delete slides (including this one) and slide content to suit your needs. They obviously represent a lot of work on our part. In return for use, we only ask the fol owing: b If you use these slides (e.g., in a class) in substantial y unaltered form, that you mention their source (after al , we’d like people to use our book!) b If you post any slides in substantial y unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our slides, and note our copyright of this material. Thanks and enjoy! JFK/KWR Al material copyright 1996-2009 J.F Kurose and K.W. Ross, Al Rights Reserved Introduction 1-2 Chapter 1: Introduction Our goal: b get “feel” and terminology b more depth, detail later in course b approach: x use Internet as example Overview: b what’s the Internet? b what’s a protocol? b network edge; hosts, access net, physical media b network core: packet/circuit switching, Internet structure b performance: loss, delay, throughput b security b protocol layers, service models b history Introduction 1-3 Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge b end systems, access networks, links 1.3 Network core b 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 Introduction 1-4 What’s the Internet: “nuts and bolts” view b millions of connected computing devices: hosts = end systems x running network apps Home network Institutional network Mobile network Global ISP Regional ISP router PC server wireless laptop cellular handheld wired links access points b communication links x fiber, copper, radio, satellite x transmission rate = bandwidth b routers: forward packets (chunks of data) Introduction 1-5 “Cool” internet appliances World’s smallest web server IP picture frame Web-enabled toaster + weather forecaster Internet phones Introduction 1-6 What’s the Internet: “nuts and bolts” view b protocols control sending, receiving of msgs x e.g., TCP, IP, HTTP, Skype, Ethernet b Internet: “network of networks” x loosely hierarchical x public Internet versus private intranet b Internet standards x RFC: Request for comments x IETF: Internet Engineering Task Force Home network Institutional network Mobile network Global ISP Regional ISP
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Introduction 1-7 What’s the Internet: a service view b communication infrastructure enables distributed applications: x Web, VoIP, email, games, e-commerce, file sharing b communication services provided to apps: x reliable data delivery
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This note was uploaded on 10/07/2010 for the course CS 52500 taught by Professor Qiu during the Fall '10 term at University of Texas.

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chapter1 - Chapter 1 Introduction Chapter 1: Introduction...

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