SR8 modules dominate modern data center deployments, serving as the workhorse for in-rack and cross-row connectivity. Priced between $1,400 and $1,800 from reputable third-party vendors, this range represents the standard entry point for 400G adoption. Independent research from ACG Research compared the three-year Total Cost of Ownership (TCO) for Carrier Ethernet, wavelength services, and dark fiber across metro (50 km), regional (200 km), and long-haul (500 km) deployments. At 100G and above, dark fiber delivers superior savings. At 400G. Shenghuan Insight: For most enterprise and mid-tier DC operators, QSFP-DD 400G DR4 and FR4 remain the sweet spot in 2026 — mature supply chain, competitive pricing on refurbished stock, and proven interoperability across major platforms. Cabling choices are often underestimated — yet they define. This document explains Cloud Interconnect pricing details. The hourly charge for each. The Realise 40G QSFP+ to 4x 10G SFP+ breakout Active Optical Cables (AOCs) offer IT professionals a cost-effective interconnect solution for merging 40G QSFP+ and 10G SFP+ enabled host adapters, switches, and servers. For typical applications, users can install this breakout or splitter cable. Finally, it presents a Total Cost of Ownership (TCO) framework to help you reframe optics from a simple consumable into a strategic infrastructure asset. Effective May 1, 2026, Google Cloud will implement pricing adjustments to the list prices for data transfer out through CDN Interconnect, Direct Peering, and Carrier Peering.