Certified Data Centre Professional (CDCP) Practice Exam

When the distance between buildings exceeds 600 meters, single mode fiber cable is the recommended choice due to its ability to maintain signal integrity over long distances. Single mode fiber uses a single light path, allowing it to transmit data over much longer distances compared to multimode fiber, copper, or coaxial cables.

Multimode fiber can experience higher attenuation and dispersion, especially over long distances, which makes it less effective for spans beyond 600 meters. Copper cables are generally suitable for shorter runs, and their performance diminishes significantly with increased distance, often becoming unreliable over 100 meters. Coaxial cable, while used for some data transmission, is not typically designed for long-distance inter-building connections and has limitations in bandwidth and distance capability.

Single mode fiber's low attenuation, high bandwidth capacity, and ability to effectively communicate over several kilometers make it ideal for connecting buildings that are far apart. This capability ensures that the data transmitted remains stable and reliable, which is essential for data center operations and inter-building communications.