1. UCB Communication Networks: Big Picture Jean Walrand U.C. Berkeley www.eecs.berkeley.edu/~wlr

2. UCB Outline Communication Networks Packets Switch Transport Future

3. UCB Communication Networks

4. UCB Communication Networks

5. UCB Communication Networks

6. UCB Communication Networks

7. UCB Communication Networks

8. UCB Communication Networks

9. UCB Communication Networks

10. UCB Communication Networks

11. UCB Communication Networks

12. UCB Packets A B A | B |... B  port 2 1 2 3 A | B |...

13. UCB Packets: Main Ideas The switches have no memory of packets: scalability The network is independent of the applications: flexibility The packet formats and addresses are independent of the technology: extensibility

14. UCB Transport

15. UCB Future... Before: “Simple” Network Client Server Network Packet Transport

16. UCB Future... Now: “Complex” Network Network Application and Contents Servers, Caches, Traffic Control, Redirection Agents, Processing

17. UCB Future... Server Location Server Allocation (Load Balancing) Traffic Control: Quality Contract Client Mobility Rapid Deployment: Self-configuration Role of Optical Switches New Problems:

18. UCB Future... Examples: Smart Dust

19. UCB Future... Examples: Sensor Networks Temperature around X? X