The important property of fiber cable among the options you provided is attenuation. Attenuation refers to the loss of signal strength as it travels through the fiber optic cable. It occurs due to factors such as absorption, scattering, and dispersion.
To determine this, we can understand the properties of the other options as well:
1) Noise: Noise refers to unwanted signals or disturbances that can interfere with the transmission and reception of data. However, fiber cables are less susceptible to noise compared to traditional copper cables.
2) Reflection: Reflection occurs when light signals bounce back off the end or discontinuity in the fiber cable. While reflection can cause signal loss, it can be minimized by using appropriate connectors and termination techniques.
3) Interference: Interference refers to the effects of electromagnetic fields from external sources, such as neighboring cables or electrical equipment. Fiber cables are immune to electromagnetic interference, making them more reliable for transmitting signals over long distances.
Therefore, among the given choices, attenuation is the most important property to consider when evaluating the performance and quality of fiber optic cables.