01introA - 01 IntroA 11 Jan 2011 CSCD58S Computer Networks...

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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 1 01introA CSCD58S Computer Networks 1 CSCD58S CSCD58S Computer Networks Computer Networks Introduction, part A: the Internet, protocols, network edge, access nets, physical media, capacity limits
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 2 01introA CSCD58S Computer Networks 2 Part I: Introduction Part I: Introduction Our goal: b get context, overview, “feel” of networking b more depth, detail later in course b approach: c descriptive c use Internet as example Overview: b what’s the Internet b what’s a protocol? b network edge b network core b access net, physical media b performance: loss, delay b protocol layers, service models b backbones, NAPs, ISPs b history
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 3 01introA CSCD58S Computer Networks 4 What What s the Internet: s the Internet: nuts and bolts nuts and bolts view view b millions of connected computing devices: hosts = end systems c running network apps Home network Institutional network Mobile network Global ISP Regional ISP router PC server wireless laptop cellular handheld wired links access points b communication links x fiber, copper, radio, satellite x transmission rate = bandwidth b routers: forward packets (chunks of data)
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 4 01introA CSCD58S Computer Networks 5 What What s the Internet: s the Internet: nuts and bolts nuts and bolts view view b protocols control sending, receiving of msgs c e.g., TCP, IP, HTTP, Skype, Ethernet b Internet: “network of networks” c loosely hierarchical c public Internet versus private intranet b Internet standards c RFC: Request for comments c IETF: Internet Engineering Task Force Home network Institutional network Mobile network Global ISP Regional ISP
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 5 01introA CSCD58S Computer Networks 6 Cool Cool Internet appliances Internet appliances IP picture frame http://www.ceiva.com/ Web-enabled toaster+weather forecaster BUG labs pluggable platform http://www.buglabs.net/products
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 6 01introA CSCD58S Computer Networks 7 What What s the Internet: a service view s the Internet: a service view b communication infrastructure enables distributed applications: c WWW, e-mail, games, e-commerce, net radio, file- swapping services, grid services, telemedicine, teleconferencing, IPphone b services provided: c connection-less c connection-oriented b services not provided: c metered delivery guarantees (e.g. by latency, jitter)
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01 IntroA 11 Jan 2011 CSCD58 Computer Networks 7 01introA CSCD58S Computer Networks 8 What is the Internet? What is the Internet?
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This note was uploaded on 02/05/2011 for the course CS 58 taught by Professor Alanrosselet during the Winter '11 term at University of Toronto- Toronto.

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01introA - 01 IntroA 11 Jan 2011 CSCD58S Computer Networks...

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