Course Description

This course provides an introduction to concepts and issues involved in computer networks and data communications. Topics include the Internet, protocol layers and their service models (both the OSI and TCP/IP models), network programming, principles of reliable data transfer, congestion control, routing, error detection and correction techniques, analog and digital data signaling and transmission, and a variety of other topics in network security, multimedia networking, mobile and wireless data communications, and network management, as time permits.

Note: Unless you have either the requisites for this course or written special permission from your Dean to enrol in it, you will be removed from this course and it will be deleted from your record. This decision may not be appealed. You will receive no adjustment to your fees in the event that you are dropped from a course for failing to have the necessary prerequisites.

Instructor Information

Required Text

One book is required for this course, and is available for purchase from the University Bookstore. A copy of the book will be made available on 2 hour reserve loan from the Allyn and Betty Taylor Library.

• J. Kurose and K. Ross. Computer Networking: A Top-Down Approach Featuring the Internet. Addison-Wesley: 2nd Edition.

Course Topics

The course will address as many of the following topics as time will allow:

• Networking fundamentals: A history of computer networking and the Internet; the structure of the Internet; connectionless and connection-oriented services; circuit switching and packet switching fundamentals; protocols; layered protocol architectures and service models.
• A tour of protocol layers: The OSI and TCP/IP layered architectures; the application layer and sample application services; transport layer services, including discussions of the principles of reliable data transfer and congestion control; network layer services, including routing and multicasting; data link layer services, including error detection and correction techniques and a variety of protocols (Ethernet, ATM, wireless 802.11b, etc.); physical layer services, including signaling, analog and digital data transmission, and channel capacity.
• Network programming: BSD socket programming; TCP and UDP programming interfaces; asynchronous communications; advanced socket options and programming techniques.
• Advanced topics: Multimedia networking; network security; wireless and mobile computing; network management.

Lecture Notes

Course lecture notes will be made available in PowerPoint and Postscript formats on the course website on a weekly basis, as they are developed. They are provided as a courtesy by the course instructor. Possessing (and even reading) these notes is not a suitable substitute for attending lectures.

Course Website

The CS357b website is at http://www.csd.uwo.ca/courses/CS357b. Lecture notes, assignments, and class information will be posted on this website. You are responsible for reading this information frequently.

TA Consulting Schedule

This will be announced on the course website when this information becomes available.

Computing Facilities

Each student will have access to an account on the Computer Science Department senior undergraduate computing facility, GAUL. In accepting the GAUL account, a student agrees to abide by the department's Rules of Ethical Conduct.

Note: After-hours access to certain Computer Science lab rooms is by student card. If a student card is lost, a replacement card will no longer open these lab rooms, and the student must bring the new card to the I/O counter. Likewise, if a student card ceases to provide access where it should, it should be brought the I/O counter as well. There, the operator will swipe the card, record the complaint and send the information to the Systems Group who will send notice when they have fixed the problem.

E-Mail Contact

We will occasionally need to send e-mail messages to the whole class, or to students individually. E-mail will be sent to your GAUL e-mail address. You must make sure that you read your e-mail on GAUL on a frequent and regular basis, or have it forwarded to an alternative e-mail address if you prefer to read it there.

You should note, however, that e-mail at ITS (your UWO account) and other e-mail providers such as hotmail.com or yahoo.com may have quotas or limits on the amount of space they can use. If you let your e-mail accumulate there, your mailbox may fill up and you may lose important e-mail from your instructors. Losing e-mail that you have forwarded to an alternative e-mail address is not an excuse for not knowing about the information that was sent.

Student Evaluation

Grades will be based on five assignments worth a total of 40%, a midterm exam worth 20%, and a final exam worth 40%.

If for any reason the assignment schedule given below cannot be adhered to, the assignment marks will be prorated. (The four assignments are worth 40% of the overall mark for the course. If an assignment has to be cancelled for any reason, the remaining assignment weights will be prorated to add up to 40%.)

To be eligible to receive a passing grade in the course, your mark on the final exam must be at least 40%, and your weighted average on the assignments must be at least 40%. To be eligible to receive a grade of C or higher, your mark on the final exam must be at least 50%, and your weighted average on the assignments must be at least 50%.

Assignment and Test Feedback

Every effort will be made to have assignments marked and handed back within 3 weeks of the handin date. Midterm exam marks will be posted within 2 weeks of the exam at the latest. If we are unable to comply with our intended return dates, revised dates will be posted on the course website.

Test and Exams (tentative)

There will be no makeup midterm exam, except for students requesting a special midterm exam for religious reasons. These students must have notified the course instructor and filed documentation with their Dean's Office at least 2 weeks prior to the midterm exam. If there are other serious medical or compassionate grounds for missing the midterm exam, please take supporting documentation to the office of the Dean of your faculty, who will contact the instructor. In such cases, the weight of your midterm exam will be shifted to the final exam, which would then be worth 60% of your final overall grade.

Assignments

Due Dates (tentative)

About the Assignments

• Assignment descriptions will be posted on the course website by the dates listed above.
• Any changes, updates, and clarifications to assignments will also be posted on the website. It is your responsibility to monitor these pages closely.
• Assignments will involve programming in C or C++, the use of Unix operating system utilities or shell scripting, and concept questions (non-programming) related to the lecture material.
• To be eligible for full marks, individual assignments must run on the departmental computing equipment. You may develop assignments on your home computer, but you must allow for the amount of time it will take to get the final product working on Computer Science's machines.

Submission of Assignments

• Paper copies of assignments are due in the course assignment lockers by midnight on the day on which they are due.
• All assignments must be type-written for legibility.
• The precise location of the assignment lockers will be announced on the course website.
• You will also be required to submit each programming assignment electronically. Details will be given in the assignment descriptions. We reserve the right to use similarity detection software to detect possible cheating cases.
• Your assignment solutions are expected to be your own individual work, not the products of group effort. On occasion, you may be allowed to make use of code from an outside source, such as your textbook. Check with your instructor if you are uncertain about the places in which you can use code written by another person. With each assignment, you are required to hand in an Assignment Submission Form, on which you certify that the material you've handed in is exclusively your own work.

Late Assignment Policy

• Late assignments will be accepted for up to five days after the due date, with weekends counting as a single day; the late penalty is 5% of the available marks per day. Lateness is based on the time the assignment is removed from the locker, not on the time it was printed.
• Late Coupons
  • Each student is given 4 late coupons. These are virtual (as opposed to physical) coupons maintained by the instructors. Late coupons may be applied toward any of Assignments 1 through 5.
  • Each coupon can be thought of as a potential one-day assignment extension. It's entirely up to you to decide when to use your coupons; more than one coupon may be used per assignment. If you wish to use any coupons with an assignment, simply note that fact on your Assignment Submission Form.
  • The intent of late coupons is to give you some free days in case of minor illness, work overload, etc. No other extensions will be given in such cases.
  • Coupons are not transferable to another student.
  • Once a coupon has been used, you cannot ``take it back'' to use for another assignment instead.
  • Unused coupons are not redeemable for extra marks.
  • Using a late coupon does not change the final date on which an assignment will be accepted. Whether or not coupons are used, the assignment must be handed in within 5 days of the original due date.

• Extensions will be granted only by your course instructor. If you have serious medical or compassionate grounds for an extension, you must take supporting documentation to the office of the Dean of your faculty, who will contact the instructor.

Assignment Marking

• Assignments are marked by the Teaching Assistants, who follow marking schemes provided by instructors. We will attempt to include some information about the marking criteria in the assignment descriptions.
• When assignment marking has been completed, you will be informed via the course website and/or e-mail.
• You will be able to pick up your graded assignments from the I/O counter on the third floor of Middlesex College. You must present your student card when retrieving assignments. To facilitate this process, you will have to submit your assignments with assignment tickets; this process will be described on the course website before the first assignment is due.
• A request for adjustment in an assignment mark must be made within 2 weeks of the date on which it was first available for pickup. (Beyond that date, regrading will not be considered, regardless of whether you retrieved your assignment.) Such a request must be submitted in writing, and must include specific reasons why you believe you deserve more marks. The request must be accompanied by all materials that were originally handed in, as well as the original marker's grade summary sheet. Regrading requests will take a minimum of 24 to 48 hours to process; you will be informed when it is complete.
• Assignment marks may be posted periodically throughout the term. It is your responsibility to check that your marks have been recorded correctly.

Assignment Backups

It is your responsibility to keep up-to-date backups of assignment disk files in case of system crashes or inadvertently erased files. Retain disk copies of all material handed in, as well as the actual graded assignment, to guard against the possibility of lost assignments or errors in recording marks. It is not safe to discard these materials until you are satisfied that your final mark for the course has been computed properly.

Tutoring

The role of tutoring is to help students understand course material. Tutors should not write assignments or take-home tests for the students who hire them. Having employed the same tutor as another student is not a legitimate defence against an accusation of collusion, should two students hand in assignments judged similar beyond the possibility of coincidence.

Each term, the Department posts a list of students interested in acting as tutors for various courses. Tutors are screened for marks in an effort to determine their suitability. The Department accepts no responsibility for problems that may arise between students and their tutors.

Ethical Conduct

All assignments are individual assignments. You may discuss approaches to problems among yourselves; however, the actual details of the work (assignment coding, answers to concept questions, etc.) must be an individual effort. Assignments that are judged to be the result of academic dishonesty will, for the student's first offence, be given a mark of zero with an additional penalty equal to the weight of the assignment also being applied. You are responsible for reading and respecting the Computer Science Department's policy on Scholastic Offences and Rules of Ethical Conduct.

Plagiarism

Students must write their essays and assignments in their own words. Whenever students take an idea or a passage from another author, they must acknowledge their debt both by using quotation marks where appropriate and by proper referencing such as footnotes or citations. Plagiarism is a major academic offence (see Scholastic Offence Policy in the Western Academic Calendar).

Plagiarism Checking

The University of Western Ontario uses software for plagiarism checking. Students may be required to submit their written work and programs in electronic form for plagiarism checking.