Princeton University Computer Science Department

Computer Science 461 Computer Networks Jennifer Rexford

Spring 2008

Collaboration Policy

Programming, like composition, is an individual creative process. Individuals must reach their own understanding of the problem and discover a path to its solution. During this time, discussions with friends are encouraged. However, when the time comes to write the code that solves the problem, such discussions are no longer appropriate; the program must be your own work.

Do not, under any circumstances, copy another person's program. This includes relevant Linux source. Writing code for use by another or using another's code in any form is academic fraud and will be dealt with harshly. You are also responsible for ensuring that the code you write for the assignments is not readable by others.

Computing Facilities

The assignments will be implemented on the Linux machines in Friend 010. You can SSH to the machines from other computers in the Computer Science department (e.g., portal.cs.princeton.edu). Please contact us if you have any trouble accessing your account.

Programming Assignments

• Assignment 0: Introduction to socket programming (due 9am Monday February 18)

• Assignment 1: Building a HTTP proxy (due 6pm Friday March 7)

• Assignment 2: Building your own Internet router (due 11:59pm Thursday April 24)

• Assignment 3: Simple Transmission Control Protocol (due 6pm Tuesday May 13)

Assignment Submission

Late Submission

You should submit your work on an assignment (electronically) before its due time. If you submit your work late, we will give you credit for it on this scale:

• 95% for work submitted up to 3 hours late,
• 90% for work submitted up to 6 hours late,
• 85% for work submitted up to 12 hours late,
• 75% for work submitted up to 24 hours late,
• 50% for work submitted up to 48 hours late,
• 0% for work submitted more than 48 hours late.

We will grant extensions only in the case of illness (with a doctor's note) or extraordinary circumstances. If illness or an extraordinary circumstance will cause you to submit an assignment late, then you should discuss the matter with your instructor as soon as possible. Please plan your work on the assignments so that travel, religious holidays, etc. do not cause you to submit it late. Note that heavy workload is not an extraordinary circumstance.

The final assignment is due on the Dean's Date, and we are not permitted to accept work after that date. Thus you may not turn in the final assignment late.