 This paper examines the issue of fairness in mixed data rate Wi-Fi networks using the carrier sense multiple access with collision avoidance, CSMA slash CA, protocol. It demonstrates that slower clients take up more time than faster ones, resulting in lower overall network throughput and poorer performance for higher data rate users. To address this problem, the authors propose two mathematical models which estimate the throughput of each client based on the number of connections and their respective data rates. They then test these models in a real-world environment and confirm that the slowest client's throughput closely matches its data rate. This article was authored by Allah Muhammad Abdul Hadi, Olga Teresyuk, Anatoly Gorbenko, and others.