1. COT 4600 Operating Systems Fall 2010
Dan C. Marinescu
Office: HEC 439 B
Office hours: Tu-Th 3:30-4:30 PM

2. Lecture 6 – Thursday September 9, 2010
Last time:
Discussion of “Hints for Computer Systems Design” by Butler Lampson.
Memory.
Today:
Interpreters.
Communication links.
Naming.
Next time
Lecture 6

3. Interpreters
Active elements. Hardware interpreters; software interpreters
Three abstractions: instruction reference, repertoire, and environment reference.
Flow of control; interrupts.
Processors. Finite-state machine with a number of distinguished initial states.
Layered organization. Example: a calendar program in Java.
Lecture 6

4. Communication links Primitives: send, receive. Wires and networks
The Internet
Internet Core and Edge
Hourglass communication model
Protocol stack
The hardware
Router
Network adaptor
Lecture 6

5. Figure 2.5 from the textbook
Lecture 6 5

6. Figure 2.7 from the textbook
Lecture 6 6

7. Internet Core and Edge
Lecture 6

8. Hourglass communication model
Lecture 6

9. Transport and Network Services
Lecture 6

10. Multiplexing and Demultiplexing
Lecture 6

11. Lecture 6

12. Application, Transport, Network, and Data Link Layer Protocols
Lecture 6

13. It's a long way to Tipperary it's a long way to go!!
Lecture 6

14. From Local Area to Wide Area Networks
Lecture 6

15. Message delivery to processes
Lecture 6

16. Sockets and Ports
Lecture 6

17. Router
Lecture 6

18. Router supporting QoS (Quality of Service)
Lecture 6

19. The network adaptor
Lecture 6