McGill University - School of Computer Science -

Presentation Overheads

Most figures are from Forouzan's "Data Communications and Networking" (2nd Ed).

Introduction (gzip'd PostScript) (pdf).
The OSI model, Signals (gzip'd PostScript) (pdf).
Encoding and Modulating (gzip'd PostScript) (pdf).
Interfaces and modems (gzip'd PostScript) (pdf).
Transmission Media (gzip'd PostScript) (pdf).
Multiplexing (gzip'd PostScript) (pdf).
Some notes on synchronous multiplexing multi-rate (non-integer-multiple) bit-stuffing.
Data Link Control
- Petri Net models
  This directory contains the .net files for use with the PNS Petri Net simulator. To allow for a quick glance, screen grabs in GIF format are included for each of the models. You can obtain Java as well as C sources of the PNS Petri Net simulator from the PNS modeller/simulator website.
  I have installed ``xpns'' on the SOCS Sun servers (nova, mimi, ...). You only need to type (or put in your .rc files)
```
 
      alias xpns /net/u1/prof/hv/PNS/xpns
     
```
  If you install from the C sources, these are the steps to follow (thanks to Hesheng Chen for trying it out):
  1. Download pns_source.tar.Z;
  2. Uncompress the above file to a directory in which you want to install xpns;
  3. "make clean" in that directory;
  4. Modify the makefile:
```
    i) In the section "OPTION SUN"
        change -L/usr/local/X11R5/lib to  -L/usr/X11R6/lib 
   ii) in the section "COMPILER UND LINKER"
        change "B = gcc-2.3.3 $O -o" to "B = gcc $O -o"
        change "CC = gcc-2.3.3 $O $I" to "CC = gcc $O $I"
      
```
  5. "make pns" in that directory;
  6. You can now run xpns by just issuing "xpns" or "./xpns"
  7. To make xpns accessible from any directory, make sure it either appears in your search path, you create an alias, or a link to it from a directory in your search path (such as /usr/local/bin). Modify the xpns script to reflect your PNS directory (/usr/local/src/PNS/ in this case):
```
 
      #!/bin/csh
      setenv XAPPLRESDIR /usr/local/src/PNS/ 
      $XAPPLRESDIR/pns
           
```
  From then on, just type xpns. Don't forget to set ``Sequential Manual'' simulation mode to get insight into the dynamics.
- Tanenbaum's protocol simulator
TCP/IP programming basic intro.
The TCP/IP state transition diagram.
You must be able to explain this and illustrate the dynamics of communication between a client and a server ! NEW.