ch1 - Chapter1 Introduction A note on the use of these ppt...

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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 all (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 following: If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially 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 All material copyright 1996-2010 J.F Kurose and K.W. Ross, All Rights Reserved Introduction 1-1
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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 s e c urity pro to c o l laye rs , s e rvic e  m o de ls his to ry Introduction 1-2
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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 Introduction 1-3
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What’s the Internet: “nuts and bolts” view millions of connected  computing devices:  hosts = end  systems  running  network apps Home network Institutional network Mobile network Global ISP Regional ISP router PC server wireless laptop cellular  handheld wired links access  points communication links fiber, copper, radio,  satellite transmission rate =  bandwidth routers:  forward packets  (chunks of data) Introduction 1-4
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Fun” internet appliances IP picture frame http://www.ceiva.com/ Web-enabled toaster + weather forecaster Internet phones Internet refrigerator Slingbox: watch, control cable TV remotely Introduction 1-5
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What’s the Internet: “nuts and bolts” view protocols  control sending, receiving  of msgs e.g., TCP, IP, HTTP, Skype,  Ethernet Internet: “network of networks” loosely hierarchical public Internet versus private intranet Internet standards RFC: Request for comments IETF: Internet Engineering Task  Force Home network Institutional network Mobile network Global ISP Regional ISP Introduction 1-6
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