These pages were revised in 2005 by Tom Dunigan with assistance from Fernando Cela Diaz. Evicted from eecs.utk.edu in 2014, links fixed 9/8/14. Requires Java.
This is a prototype for a course on TCP internal mechanisms and is intended for showing the capabilities of the VINT/LBL/UCB ns Network Simulator for undergraduate education . In addition to the plain ns, it also uses the following tools:
The tutorial and the class RFC793edu were written for teaching Jacobson's SIGCOMM'88 Paper.
There are several initiatives for the introduction of computer network simulators in undergraduate courses; you can find here an annotated list of links.
Many thanks to Sally Floyd and to LLoyd Wood for the guidance with ns and to Ahmet Sekercioglu for his helpful comments.
This tutorial is part of an undergraduate project work done under a Socrates/Erasmus agreement program between the Chalmers University of Technology (Göteborg, Sweden) and the University of Vigo (Vigo, Spain) established by Oscar Rubiños (oscar@tsc.uvigo.es). The overall work was supervised by Sven Tafvelin (tafvelin@ce.chalmers.se).
Suggestions and bug reports are welcome (english corrections included ;-) mail to fcela@acm.org
If you are working on simulation assignments for undergraduate education, we will be happy to know your work and ideas and to set a link to your page. Please send us an email (F. Cela: fcela@acm.org; A. Goller: algo@chl.chalmers.se).
The Sliding-Window Flow Control: Avoid
peer overloading and achieving self-clocking.
Karn's Algorithm: Obtain more accurate
RTT estimations.
RTT Variance Estimation: Adapt to RTT
changes.
The Congestion-Avoidance Algorithm:
Stabilize the system on congestion.
The Slow-Start Algorithm: Find
network capacity at the start of the connection.
The Fast-Retransmit Algorithm: Avoid
long transmission stops after a packet is dropped.
The Fast-Recovery Algorithm: Keep the
pipe full.