CST 311 Computer Networks - Week 6

 Week 6 Overview:

This week wrapped up the data plane and focused heavily on Programming Assignment 3, where we created a TCP-based chat service. We built both the server and client programs to enable two-way communication over reliable TCP connections. The project introduced multithreading, allowing simultaneous message sending and receiving between multiple clients, which made the chat feel more realistic. Everything was tested in Mininet with three hosts simulating a small network setup.

For extra credit, I extended the program by adding username functionality, letting users identify themselves instead of generic client names, and implemented offline messaging, where messages sent before another client connects are stored and delivered once they join. These additions made the chat system more dynamic and closer to real-world applications. This week really tied together everything about TCP reliability, sockets, and concurrent programming in a practical, hands-on way.

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