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As cyber threats evolve, unconventional attack vectors such as side-channel techniques arebecoming increasingly relevant in modern security research. This bachelor thesis investigateswhether electromagnetic and thermal emissions from modern Ethernet cables can be used todetect the volume of network traffic from a distance. To address this research question,controlled experiments were conducted using instruments like RTL-SDR, Keysight spectrumanalyzer, and FLIR thermal cameras. Measurements of electromagnetic and thermal emissionswere collected before, during, and after network traffic transmission in a controlledenvironment. Multiple tests were conducted with different network traffic load. For theenvironment, we used different techniques to minimise the impact on the Ethernet cables beingtested by minimising airflow and outer external factors. The results demonstrate a measurablecorrelation between increases in electromagnetic emissions and thermal emissions from theEthernet cable. As this bachelor thesis is, to the best of our knowledge, the first study on thisproblem, more rigorous tests are needed to draw an exact conclusion to the problemformulation. To conclude, state of the practice equipment was used to investigate the possibilityand to what extent the volume of Ethernet traffic can be picked up from a distance. But furtherwork is required to determine whether a quantifiable relationship exist. These findings highlighta potential side-channel vulnerability in Ethernet based communication systems.