The use of the internet for employees is a crucial need to support the completion of their work. STMIK IKMI Cirebon also provides internet facilities for its employees. However, the internet facilities provided are not yet optimal, as evidenced by frequent connection disruptions. This study aims to measure the performance of the internet connection at STMIK IKMI Cirebon. The method used is Quality of Service (QoS), which is a method to assess how well the installed network functions and its ability to define the attributes of the network services provided. QoS is necessary to calculate the parameters that determine the quality of an internet network. The steps in this study include recording network traffic using Wireshark, followed by calculating parameters such as bandwidth, packet loss, delay, throughput, and jitter. The study results indicate that during data upload from 08:00 to 12:05 at STMIK IKMI Cirebon, the throughput percentage achieved was 31% with an index of 1 "POOR," delay was 9.444 ms with an index of 4 "VERY GOOD," jitter was 8.444 ms with an index of 3 "GOOD," and packet loss was 0% with an index of 4 "VERY GOOD." During data download from 15:00 to 19:05, the throughput percentage achieved was 132% with an index of 4 "VERY GOOD," delay was 14.052 ms with an index of 4 "VERY GOOD," jitter was 13.052 ms with an index of 3 "GOOD," and packet loss received an index of 4 "VERY GOOD." Based on these results, it can be concluded that these values have met the TIPHON standard for both upload and download, indicating that the internet connection at STMIK IKMI Cirebon is still suitable for use
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