Which phenomenon limits signal propagation speed over long unshielded twisted pair cable runs?

💡 Explanation

When signals propagate through unshielded twisted pairs, capacitive crosstalk occurs because of parasitic capacitance between the closely spaced conductors, injecting noise onto adjacent pairs and corrupting the signal, limiting propagation speed. Therefore, capacitive crosstalk is limiting, rather than dielectric losses, skin effect, or magnetic saturation, which induce attenuation but require different cable properties.

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