Assignment: read Part I: Introduction chapter 1 in text O ur goa Overview: r get context r what's the Internet overview, feel " of r what's a protocol? networKing r network edge r more depth detail r network core later in course r access net, physical media r approach: m descriptive performance: loss, delay m use Internet as r protocol layers, service models backbones NAPs, ISPs example r history 1: Introduction 1
1: Introduction 1 Part I: Introduction Our goal: r get context, overview, “feel” of networking r more depth, detail later in course r approach: m descriptive m use Internet as example Overview: r what’s the Internet r what’s a protocol? r network edge r network core r access net, physical media r performance: loss, delay r protocol layers, service models r backbones, NAPs, ISPs r history Assignment: read chapter 1 in text
What's the Internet: "nuts and bolts"view router r millions of connected workstation computing devices: hosts server mobile end-systems 投 al Is n pc s worksTations, servers m PDA's phones, toasters running network apps r communication links m fiber, copper, radio satellite r routers: forward packets (chunks )of data thru company network network 1: Introduction 2
1: Introduction 2 What’s the Internet: “nuts and bolts” view r millions of connected computing devices: hosts, end-systems m pc’s workstations, servers m PDA’s phones, toasters running network apps r communication links m fiber, copper, radio, satellite r routers: forward packets (chunks) of data thru network local ISP company network regional ISP router workstation server mobile
Cool"internet appliances IP picture frame http://www.ceiva.com leb-enabled toaster+weather foreca http://dancing-man.com/robin/toastyster World's smallest web server http://www-ccs.cs.umass.edu/-shri/ipic.html 1: Introduction 3
1: Introduction 3 “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 http://dancing-man.com/robin/toasty/
What's the Internet: "nuts and bolts"view r protocols: control sending router workstation receiving of msgs server e.g., Tcp, Ip, Http, Ftp, PpP mobile Internet: " network of 投 al Is networks loosely hierarchical m public Internet versus regional/ISP private intranet r Internet standards RFC: Request for comments IETF: Internet Engineering Task Force company B g 1: Introduction 4
1: Introduction 4 What’s the Internet: “nuts and bolts” view r protocols: control sending, receiving of msgs m e.g., TCP, IP, HTTP, FTP, PPP r Internet: “network of networks” m loosely hierarchical m public Internet versus private intranet r Internet standards m RFC: Request for comments m IETF: Internet Engineering Task Force local ISP company network regional ISP router workstation server mobile
What's the Internet: a service view r communication infrastructure enables distributed applications m WWW, email, games,e commerce, database ●●●口 voting, file(mP3)sharing r communication services provided connectionless connection-oriented yberspace [Gibson a consensual hallucination experienced daily by billions of operators in every nation 1: Introduction 5
1: Introduction 5 What’s the Internet: a service view r communication infrastructure enables distributed applications: m WWW, email, games, ecommerce, database., voting, file (MP3) sharing r communication services provided: m connectionless m connection-oriented r cyberspace [Gibson]: “a consensual hallucination experienced daily by billions of operators, in every nation,