Can I use a network patch cord that is too long?

Although it is possible to use excessively long network patch cords, it is generally not recommended to do so as they may bring a range of potential issues.
Firstly, the length of network patch cords directly affects the quality of signals. As the length of the jumper increases, the signal will experience more attenuation and interference during transmission, which may cause to weakened signal strength, decreased transmission rate, and even packet loss or errors. Especially in high-speed network environments, such as Gigabit Ethernet or higher-level networks, excessively long jumpers can significantly affect the performance and stability of the network.
Secondly, excessively long network patch cords may also increase the risk of electromagnetic interference (EMI) and radio frequency interference (RFI). These interferences may come from surrounding electronic devices, power lines, or other network equipment, which can enter the network system through network patch cords and cause further damage to the signal.
In addition, excessively long network patch cords can increase the complexity and cost of wiring. In data centers, offices, or other network environments, excessively long jumpers require more space to accommodate and may require additional fixing and organizing measures to avoid confusion and security risks. Meanwhile, longer jumpers also mean higher material costs.
Therefore, when selecting network patch cords, the length of the jumpers should be reasonably determined based on actual needs and network environment. Generally speaking, it is recommended to choose shorter jumpers within the specified length limit to ensure network performance and stability. If longer jumpers are indeed needed, appropriate measures should be considered to reduce the impact of signal attenuation and interference, such as using higher quality jumpers, optimizing wiring schemes, etc.