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Using shielded cables can indeed reduce electromagnetic interference (EMI) and radio frequency interference (RFI) problems. Shielded cables are designed with a protective layer that surrounds the conductive wires within, which serves as a barrier against external electromagnetic fields. This shield can be made from various conductive materials, such as copper or aluminum, which effectively absorb and redirect incoming interference away from the signal-carrying conductors.

The effectiveness of shielded cables is particularly evident in environments where electronic devices operate closely together or where heavy machinery that generates significant EMI is present. The shielding prevents the interference from disrupting the signals transmitted through the cables, ensuring clearer and more reliable communication in data transmission.

While the shielded cables can be beneficial in many scenarios, their effectiveness may vary based on the specific circumstances, such as the frequency of the interference, the quality of the shielding, and the installation technique. However, the primary function of the shield is to mitigate these interference issues, which is why using shielded cables is generally seen as a valid strategy for addressing EMI and RFI concerns.