COMP3331/9331 Computer Networks and Applications

COMP3331/9331 Computer Networks and Applications

Assignment for Term 2, 2022

Version 1.0

11:59 am (noon) Friday, 5 August 2022 (Week 10)

1. Change Log

Version 1.0 is released on 21/06/2022.

2. Goal and learning objectives

Zoom and Microsoft Teams are widely used as a method for large groups of people to hold online

virtual meetings. A good example is the online Zoom lectures used for various courses at UNSW. In

this assignment, you will have the opportunity to implement your own version of an online video

conferencing and messaging application. Your application is based on a client-server model

consisting of one server and multiple clients communicating concurrently. The text messages should

be communicated using TCP for the reason of reliability, while the video (you will use video files

instead of capturing the live video streams from cameras and microphones) should be communicated

using UDP for the reason of low latency. Your application will support a range of functions that are

typically found on videoconferencing including authentication, broadcasting text messages to all

participants, building a separate room for part of the participants, and uploading video streams (i.e.,

files in this assignment). You will be designing custom application protocols based on TCP and UDP.

2.1 Learning Objectives

On completing this assignment, you will gain suffificient expertise in the following skills:

1. Detailed understanding of how client-server and client-client interactions work.

2. Expertise in socket programming.

3. Insights into designing and implementing an application layer protocol.

3. Assignment Specification

3.1. Assignment Specification.

3.2 Authentication

3.3. Text message commands

BCM: Broadcast Message

BCM message

ATU: Download Active Users

ATU

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