1. Network 20 Questions Overview
Networked Life: 20 Questions and Answers (M. Chiang, Princeton University)
Network 20 Questions Overview
Prof. Hongseok Kim
Sogang University, EE

2. Networks everywhere

3. Facebook network

4. Twitter network

5. Wikipedia network

6. YouTube network

7. The Internet

8. P2P network

9. Access network

10. Cellular network

11. Wireless spectrum

12. Preview trailer
You aren’t supposed to understand the next hour.

13. Q1
What makes CDMA work for my smartphone?

14. Q2
How does Google sell ad spaces?

15. Q3
How does Google rank webpages?

16. Q4
How does Netflix recommend movies?

17. Q5
When can I trust an average rating on Amazon?

18. Q6
Why does Wikipedia even work?

19. Q7
How do I viralize a YouTube video and tip a Groupon deal?

20. Q8
How do I influence people on Facebook and Twitter?

21. Q9
Can I really reach anyone in six steps?

22. Q10
Does the Internet have an Achilles’ heel?

23. Q11
Why do AT&T and Verizon Wireless charge me $10 a GB?

24. Q12
How can I pay less for each GB?

25. Q13
How does traffic get through the Internet?

26. Q14
Why doesn’t the Internet collapse under congestion?

27. Q15
How can Skype and BitTorrent be free?

28. Q16
What’s inside the cloud of iCloud?

29. Q17
IPTV and Netflix: How can the Internet support video?

30. Q18
Why is WiFi faster at home than a hotspot?

31. Q19
Why am I getting only a few % of the advertised 4G speed?

32. Q20
Is it fair that my neighbor’s iPad downloads faster?

33. Pedagogical approach
Why teach fun in a boring way?

34. 1. Just in time Never delay gratification
Never introduce math unless it is used right now

35. 2. Bridge theory and practice
No spherical cows or infinite lines
Try to avoid random graphs and rational people
Still some questions have a big theory-practice gap in their answers

36. 3. Lectures as a network

37. Methodologies

38. Bigger pictures Bring engineering to “network science”
The importance of domain specific functionalities
Bring networking principles to engineering curriculum
Modern view of engineering education

39. Concepts

40. 20 concepts Resource sharing
Opinion aggregation and consensus formation
Positive network effect
Negative network effect
Wisdom of crowds
Fallacy of crowds
Functional hierarchy and layering
Spatial hierarchy and overlaying
From local actions to global properties
Overprovision capacity vs overprovision connectivity

41. 20 concepts Feedback control Utility maximization Protocols Signaling
Randomization
Graph consistency model
Strategic equilibrium
Generative models
Latent-factor models
Axiomatization models

42. Why take the course? Relevant to your life Intellectually exciting
Learn a lot
Learn a few things you’ll never forget

43. Logistics
A course about networks and by these networks

44. Prerequisite and difficulty
Linear algebra
Multivariable calculus
Or…. Only addition and multiplication with some logical thinking

45. Books

46. Networks They run your life You’ve got to know them The cool artifacts
The mathematical models
But also the big ideas