Selecting between shielded (STP) and unshielded (UTP) network cables depends on the electromagnetic environment, installation requirements, and system compatibility. This paper explains how electromagnetic interference can affect performance, leading to data loss or degraded image quality, and how shielding helps reduce both emissions and susceptibility to interference. STP cables provide better protection in electrically noisy or outdoor environments but are more expensive, heavier, and harder to install, while UTP cables are more cost-effective and easier to handle for standard indoor deployments. The paper also discusses regulatory considerations such as Class A and Class B device requirements and recommends choosing cable types based on environmental conditions and compliance needs.

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