Certified Data Centre Professional (CDCP) Practice Exam 2026 - Free CDCP Practice Questions and Study Guide

Using single-mode optical cable is the most suitable choice for establishing a high-speed connection between two buildings that are 600 meters apart because of its design and capabilities. Single-mode fibers allow for the transmission of light signals over long distances with minimal loss and high bandwidth, making them ideal for communications that require high-speed and reliable data transfer.

Single-mode optical cables have a smaller core diameter, typically around 8 to 10 microns, which allows only one mode of light to propagate. This results in less dispersion and attenuation compared to multi-mode cables, which is particularly advantageous over longer distances such as the 600 meters in this scenario. Therefore, for connections requiring high capacity and long-distance transmission, single-mode optical cables are preferred.

The other cable options, such as Cat5E and Cat6, are limited by their maximum transmission distances and overall performance. While Cat5E can support distances of up to 100 meters, and Cat6 can go slightly further with increased performance, neither is suitable for a connection span of 600 meters without significant signal degradation.

Multi-mode optical cable, while capable of handling short to medium distances and providing good speed, still experiences higher attenuation than single-mode fiber, primarily due to modal dispersion. At 600 meters, multi