The core of the Fourth Industrial Revolution lies in data-driven production flexibility and intelligent decision-making. The implementation of Industrial Internet of Things (IIoT), digital twins, and AI-driven quality inspection necessitates real-time connectivity for vast numbers of factory equipment and localised data processing. This compels the accelerated convergence of traditionally isolated operational technology (OT) networks with information technology (IT) networks, thereby introducing IT's demands for high bandwidth and low latency into industrial environments characterised by oil contamination, vibration, and electromagnetic interference. Consequently, establishing industrial-grade networking and edge computing infrastructure capable of withstanding harsh physical environments, supporting high-bandwidth industrial protocols (such as TSN), and enabling refined energy efficiency and operational maintenance has become a prerequisite for unlocking the potential of smart manufacturing.