Chapter 1 Computer Networks and the Internet computer networking rhind flitho James F.Kurose Keith W Ross 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 Computer Networking: (including this one)and slide content to suit your needs.They obviously A Top Down Approach represent a lot of work on our part.In return for use,we only ask the following: Featuring the Internet, If you use these slides (e.g.,in a class)in substantially unaltered form, 3rd edition that you mention their source(after all,we'd like people to use our book!) f you post any slides in substantially unaltered form on a ww site,that Jim Kurose,Keith Ross you note that they are adapted from(or perhaps identical to)our slides,and note our copyright of this material. Addison-Wesley,July 2004. Thanks and enjoy!JFK/KWR All material copyright 1996-2006 J.F Kurose and K.W.Ross,All Rights Reserved Introduction 1-1
Introduction 1-1 Chapter 1 Computer Networks and the Internet Computer Networking: A Top Down Approach Featuring the Internet, 3rd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2004. 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 1996-2006 J.F Kurose and K.W. Ross, All Rights Reserved
Chapter 1:Computer Networks and the Internet Our goal: Overview: 口get"feel"and ▣what's the Internet terminology 口what's a protocol3? 口more depth,detail ▣network edge later in course ▣network core 口approach: access net,physical media *use Internet as Internet/ISP structure example performance:loss,delay protocol layers,service models 口network modeling Introduction 1-2
Introduction 1-2 Chapter 1: Computer Networks and the Internet 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 ❑ network core ❑ access net, physical media ❑ Internet/ISP structure ❑ performance: loss, delay ❑ protocol layers, service models ❑ network modeling
Chapter1:roadmap(路标) 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay loss in packet-switched networks 1.7 Protocol layers,service models 1.8 History Introduction 1-3
Introduction 1-3 Chapter 1: roadmap(路标) 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay & loss in packet-switched networks 1.7 Protocol layers, service models 1.8 History
What's the Internet:"nuts and bolts'"view俱体细 millions of connected X router 必 computing devices:hosts workstation end systems 目server mobile □running network apps cal ISP ▣communication links fiber,copper,radio, satellite transmission rate bandwidth routers:forward packets (chunks(大块)of data) compary边 network Introduction 1-4
Introduction 1-4 What’s the Internet: “nuts and bolts” view (具体细节) ❑ millions of connected computing devices: hosts = end systems ❑ running network apps ❑ communication links ❖ fiber, copper, radio, satellite ❖ transmission rate = bandwidth ❑ routers: forward packets (chunks（大块） of data) local ISP company network regional ISP router workstation server mobile
"Cool"internet appliances Web-enabled toaster weather forecaster IP picture frame(框架) http://www.ceiva.com/ World's smallest web server http://www-ccs.cs.umass.edu/-shri/iPic.html Internet phones Introduction 1-5
Introduction 1-5 “Cool” internet appliances World’s smallest web server http://www-ccs.cs.umass.edu/~shri/iPic.html IP picture frame（框架） http://www.ceiva.com/ Web-enabled toaster + weather forecaster Internet phones