6.033 Spring 2015 Lecture 9, Slide #1

Computer Networks

6.033 Lecture 9 Hari Balakrishnan

hari@mit.edu

6.033 Spring 2015 Lecture 9, Slide #2

Applications on the Internet

6.033 Spring 2015 Lecture 9, Slide #3

Applications on the Internet

6.033 Spring 2015 Lecture 9, Slide #4

Applications on the Internet

6.033 Spring 2015 Lecture 9, Slide #5

Applications on the Internet

6.033 Spring 2015 Lecture 9, Slide #6

National Academy of Engineering (http://www.greatachievements.org/)

6.033 Spring 2015 Lecture 9, Slide #7

6.033 Spring 2015 Lecture 9, Slide #8

6.033 Spring 2015 Lecture 9, Slide #9

An Amazing Infrastructure

6.033 Spring 2015 Lecture 9, Slide #10

Physical Communication Channels

6.033 Spring 2015 Lecture 9, Slide #11

Internet users per 100 inhabitants Source: International Telecommunications Union

CC BY-SA 3.0

6.033 Spring 2015 Lecture 9, Slide #12

Universal Network Layer: IP

6.033 Spring 2015 Lecture 9, Slide #13

IP packet format (v4 and v6)

6.033 Spring 2015 Lecture 9, Slide #14

Layering

6.033 Spring 2015 Lecture 9, Slide #15

Evolution of design

“The choice for network identification (8 bits) allows up to 256 distinct networks. This size seems sufficient for the foreseeable future.”

6.033 Spring 2015 Lecture 9, Slide #16