Chapter1_Introduction

Chapter1_Introduction - Chapter 1 Introduction CS 6843...

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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. CS 6843 Computer Networking Professor Strauss Office: LC123 Voice: 718-260-3308 Email: fstrauss@poly.edu Office Hours: Monday
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Introduction 1-2 Chapter 1: Introduction Our goal: get “feel” and terminology more depth, detail later in course approach: use Internet as example
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Introduction 1-3 Chapter 1: Introduction 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
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Introduction 1-4 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
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Introduction 1-5 1.1 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)
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Introduction 1-6 1.1 “Cool” internet appliances World’s smallest web server http://www-ccs.cs.umass.edu/~shri/iPic.html IP picture frame http://www.ceiva.com/ Web-enabled toaster + weather forecaster Internet phones
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Introduction 1-7 1.1 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
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Introduction 1-8 1.1 What’s the Internet: a service view communication infrastructure enables distributed applications: Web, VoIP, email, games, e-commerce, file sharing communication services provided to apps: reliable data delivery from source to destination “best effort” (unreliable) data delivery
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Introduction 1-9 1.1 What’s a protocol? human protocols: “what’s the time?” “I have a question” introductions … specific msgs sent … specific actions taken when msgs received, or other events network protocols: machines rather than humans all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt
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Introduction 1-10 1.1 What’s a protocol?
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This note was uploaded on 04/04/2010 for the course CS 6843 taught by Professor Ssss during the Spring '10 term at NYU.

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Chapter1_Introduction - Chapter 1 Introduction CS 6843...

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