COMP 561:Computer Networks Qian Zhang Fd2008 HKUST
Introduction 1-1 COMP 561: “Computer Networks” Qian Zhang Fall 2008 HKUST
Chapter 1 oInpulcr Networking Introduction A note on the use of these ppt slides James F Kuse. Keith W Ross The notes used in this course are substantially based on powerpoint slides developed and Computer Networking copyrighted by J.F. Kurose and K.W. Ross, 2007 A Top Down Approach 4th edition Jim Kurose. Keith ross Addison-Wesley, July 2007 Introductio 1-6
Introduction 1-6 Chapter 1 Introduction Computer Networking: A Top Down Approach , 4th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007. A note on the use of these ppt slides: The notes used in this course are substantially based on powerpoint slides developed and copyrighted by J.F. Kurose and K.W. Ross, 2007
Chapter 1: Introduction ur god Overview: 口Get"feel"and 口 What's the Internet? terminology 口 More depth, detai 口 What's a protocol? later in course a Network edge; hosts,access Approach net, physical media ☆凵 se Internet as a Network core: packet/circuit example switching, Internet structure a Performance: loss, delay throughput 口 Security a Protocol layers, service models 口 Histo Introductio
Introduction 1-7 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 ❑ Security ❑ Protocol layers, service models ❑ History
Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge O End systems, access networks, links 1.3 Network core a 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: securi 1.7 History Introduction 1-8
Introduction 1-8 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
What's the Internet: nuts and bolts"view C口 Millions of connected Mobile network computing devices Global isp wireless hosts end systems apOp g Running network cellular handheld apps Home network O Communication links Relgiona) ISP access 令Fber, copper, points radio, satellite Institutional network wired links Transmission rate bandwidth 画越 口 Routers: forward packets(chunks of data) Introductio 1-9
Introduction 1-9 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)