Certified Data Centre Professional (CDCP) Practice Exam 2026 – All-In-One Study Resource to Ace Your Certification!

The maximum length of Cat5E network cables allowed through a building is 90 meters. This measurement pertains specifically to the horizontal cabling segment, which is defined as the distance from the telecommunications room to the work area outlet. This length ensures optimal performance and minimizes signal degradation, which can occur due to various factors such as attenuation and interference in longer runs. It’s important to adhere to this standard to maintain network integrity and performance within buildings.

Other options, such as 68 meters or 150 meters, do not conform to the established best practices outlined in standards such as TIA/EIA-568, which set the specifications for data cabling installations. The figure of 3 kilometers is far beyond any acceptable length for standard Ethernet cabling and is not practical for maintaining the quality and reliability required for data transmission. Therefore, 90 meters is the correct benchmark for the installation of Cat5E cables in a typical building setting.