This article provides a detailed technical comparison between CPO and LPO technologies, exploring their working principles, advantages, limitations, and implications for PCB design—essential knowledge for electronics manufacturers navigating the future of high-speed data. This article provides a detailed technical comparison between CPO and LPO technologies, exploring their working principles, advantages, limitations, and implications for PCB design—essential knowledge for electronics manufacturers navigating the future of high-speed data. CPO (Co-Packaged Optics) and LPO (Linear Drive Pluggable Optics) represent two revolutionary approaches to addressing the critical challenges of power efficiency, bandwidth density, and signal integrity in modern data centers. While both technologies aim to overcome the limitations of traditional. The relentless demand for higher bandwidth, lower latency, and improved power efficiency in hyperscale data centers and AI/ML clusters is pushing optical interconnect technology to its limits. Traditional pluggable optics with sophisticated DSPs face challenges in power consumption and cost at 800G. One of the most groundbreaking network innovations driving transformations of data centers in 2025 is Linear Pluggable Optics (LPO)—a Digital Signal Processor (DSP)-free optical solution designed to optimize power, cost, and latency. These networks are designed with three tiers that facilitate strategic installation, management, and maintenance, and so on. The strategic design of a hierarchy network may comprise more than three layers. Different types of Ethernet switches perform different roles in the layers of high-capacity networks. Core switches, distribution switches, and access switches are the common types of switches used in layer-based or hierarchy Ethernet networks. LPO cuts per-module power by 40–50% and latency from 8–10 ns to under 3 ns.