Computer Networks Zili Zhang(张自力) Faculty of Computer and Information Science Southwest China Normal University Introduction 1-1
Introduction 1-1 Computer Networks Zili Zhang(张自力) Faculty of Computer and Information Science Southwest China Normal University
Chapter Computer Networks and the Internet Computer Networking The powerPoint slides are based on the material A Top Down Approach provided by Featuring the Internet, J. f Kurose and K.W. ross 2nd edition Jim Kurose, Keith Ross Addison-Wesley, July 2002 Introduction 1-7
Introduction 1-7 Chapter 1 Computer Networks and the Internet Computer Networking: A Top Down Approach Featuring the Internet, 2nd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2002. The PowerPoint Slides are based on the material provided by J.F Kurose and K.W. Ross
Chapter 1: Introduction Our goal: Overview: 口 get context, 口 What's the internet overview, feel"of o what's a protocol? networ King 口 network edge 口 more depth, detai 口 network core later in course a access net, physical media 口 approach a Internet/IsP structure descriptive m use internet as a performance: loss, delat example a protocol layers, service models u history Introduction 1-8
Introduction 1-8 Chapter 1: Introduction Our goal: q get context, overview, “feel” of networking q more depth, detail later in course q approach: m descriptive m use Internet as example Overview: q what’s the Internet q what’s a protocol? q network edge q network core q access net, physical media q Internet/ISP structure q performance: loss, delay q protocol layers, service models q history
Chapter 1: roadmap 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 1-9
Introduction 1-9 Chapter 1: roadmap 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 O millions of connected router computing devices: hosts workstation end-systems server mobile PCs workstations servers 丹IsP m PDAs phones, toasters running network apps ●●● 口 communication links regionalISM wn fiber copper radio satellite m transmission rate= bandwidth o routers: forward packets company (chunks of data) network Introduction 1-1
Introduction 1-10 What’s the Internet: “nuts and bolts” view q millions of connected computing devices: hosts, end-systems m PCs workstations, servers m PDAs phones, toasters running network apps q communication links m fiber, copper, radio, satellite m transmission rate = bandwidth q routers: forward packets (chunks of data) local ISP company network regional ISP router workstation server mobile