Networking Lecture 01 - Introduction

Outline: 0:08 Why take Computer Networking? 4:15 Required reading 4:45 A Quick Overview of the Internet 5:33 How does the Internet work? 8:20 What is the Internet? 11:29 Who controls the Internet? 21:48 The Internet != The Web 24:36 The Internet is distributed and loosely coupled 27:29 Human protocols 30:28 The Internet – in practice 32:45 Human protocols 32:48 The Internet – in practice 33:01 Access networks and local-area networks 34:12 Public Switched Telephone Network (PSTN) 38:45 Home Internet access uses old networks 41:23 Connecting to the Internet in the 1990s 44:41 Digital Subscriber Line (DSL) 46:26 Cable Networks 46:27 Frequency Division Multiplexing 46:28 Cable Networks 47:14 Frequency Division Multiplexing 47:38 Network was originally designed for one-way broadcast... 47:46 A way to share a single communication medium 47:49 Modern wired/guided media 50:38 Radio is a wireless/unguided medium 56:24 A look at the network core 56:27 Circuit Switching was used in the PSTN 1:00:26 Circuit switched backbone links are multiplexed 1:02:05 Computer networks use Packet Switching 1:05:08 Packet vs Circuit switching 1:06:24 Network performance metrics 1:08:44 Network performance is constantly changing! 1:11:33 Cumulative distribution function (CDF) 1:12:09 Network performance experiment 1:15:16 Recap: Internet Overview These lectures were delivered by Professor Steve Tarzia in Fall 2020 for the CS-340 Introduction to Computer Networking course at Northwestern University. Course materials and slides can be downloaded from https://stevetarzia.com/teaching