Network Defense Essentials (NDE) Practice Exam 2025 - Free Network Defense Practice Questions and Study Guide

The Standby-Ferro UPS system is characterized by its use of a ferroresonant transformer, which helps to regulate voltage and provides some level of immunity to surges and brownouts. However, this system has limitations when it comes to modern computer power supply loads, which often exhibit varying power requirements and draw a significant amount of current suddenly.

As computers and their power supplies have evolved, the demands placed on UPS systems have increased, making the Standby-Ferro configuration less effective. This type of UPS may struggle to provide stable and reliable power to equipment that has switching power supplies, which can lead to operational instability or inefficiency.

In contrast, other UPS types, such as Standby, Line-Interactive, and Online, are commonly used and tend to handle modern electronic loads more effectively. Standby UPS systems provide basic backup functionality, Line-Interactive systems offer better voltage regulation and surge protection, while Online UPS systems deliver the best protection by continuously providing power and conditioning it regardless of input voltage fluctuations. These features make them more suitable for contemporary computing environments.