Certified Data Centre Professional (CDCP) Practice Exam 2025 – All-In-One Study Resource to Ace Your Certification!

Excessive common mode noise at a connected point is detrimental to data integrity and system performance. When this type of noise is present, it can lead to interference that disturbs the proper functioning of electronic equipment and communication devices. This interference can cause errors in data transmission, leading to incorrect information being processed or received. As a result, it can significantly decrease the reliability of the equipment. Systems may experience more frequent failures or malfunctions, which in turn requires additional maintenance and repair, ultimately affecting the overall reliability of the equipment.

The other options, while they may represent positive outcomes under normal circumstances, do not align with the impact of excessive noise. Improved communication speeds, enhanced data transfer rates, and lower operating costs would typically stem from optimized performance and noise-free environments, not from conditions characterized by excessive noise.