Cool"internet appliances(200 Web-enabled toaster weather forecaster IP picture frame http://www.ceiva.com tallest web server ccs cS umass. edu/-shriliPic html Internet phones erfeng Computer network-Introduction 8/87
Introduct by Weifeng Sun Computer network-Introduction 8/87 “Cool” internet appliances(2006) 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
How to study? study vs. learn Novel Our own way For computer network or other lessons erfeng Computer network-Introduction 9/87
Introduct by Weifeng Sun Computer network-Introduction 9/87 How to study? • Study vs. learn – Novel – Our own way – For computer network or other lessons
How to draw a Network Node Link N ode erfeng Computer network-Introduction 10/87
Introduct by Weifeng Sun Computer network-Introduction 10/87 How to Draw a Network Node Link Node
Building block: The Links Electrical questions N ode oltage, frequency,… Wired or wireless? Link-layer issues: How to send data? When to talk -can everyone talk at once Stay tuned for lecture 5 By.what about more nodes? erfeng Computer network-Introduction 11/87
Introduct by Weifeng Sun Computer network-Introduction 11/87 Building block: The Links • Electrical questions – Voltage, frequency, … – Wired or wireless? • Link-layer issues: How to send data? – When to talk – can everyone talk at once? – What to say – low-level format? – Stay tuned for lecture 5 • Okay… what about more nodes? Node Link Node
But what if we want more hosts? 口囗口 IpI One wire Wires for everybody scalability ?! Computer network-Introduction 12/87
Introduct by Weifeng Sun Computer network-Introduction 12/87 • … But what if we want more hosts? • Scalability?! One wire Wires for everybody!