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Form Factor vs Speed QSFP28 → ~100 GbE QSFP56 → ~200 GbE QSFP-DD / QSFP112 → ~400 GbE and above QSFP-DD slots can accept older QSFP56 / QSFP28 optics via pin reuse — useful for backward compatibility.   Cables & Breakout Links Type Part # (Example) Form / Speed Notes DAC 400G MCP1660-W0xxxxx QSFP-DD 400G Short reach / lightweight AOC 400G MFA1U60-Wxxx QSFP-DD 400G Up to ~100 m OM4/SMF 400G to 2×200G AOC vendor variants Split 400G Spine→host breakout 200G DAC (QSFP56) MCP1650-V0xxxxx QSFP56 200G Short in-rack links

Sitting on Decommissioned AI Hardware? Turn Surplus GPUs and Network Gear Into Value Every year, companies quietly retire powerful IT infrastructure—GPU servers, high-speed switches, and optics that once powered AI, analytics, and high-performance workloads. Too often, that hardware ends up forgotten in a rack, a cage, or a storage room because selling it feels complicated, risky, or simply not worth the time. If that sounds familiar, this page is for you. At Resilient Tec, we specialize in helping organizations sell decommissioned AI hardware and high-performance networking equipment. We work with teams that own their infrastructure and are retiring GPUs, switches, optics,...

If you’ve spent any time in a data center recently, especially one focused on AI infrastructure or high-performance computing (HPC), you know the "Interconnect War" is reaching a boiling point. For years, InfiniBand was the undisputed king of HPC and AI training clusters. But as we move into 2026, a "perfect storm" of open standards and massive bandwidth requirements is pushing RoCE v2 (RDMA over Converged Ethernet) from a budget alternative to a front-line contender for data center interconnects. Here is the 2026 breakdown of why these RDMA protocols matter for AI networking—and the new "Ultra" player you need to...

In the world of enterprise networking, Cisco and Aruba (now under HPE) remain two of the most respected names for switches, wireless access points, and overall campus/branch infrastructure. Cisco has long been the go-to for comprehensive, battle-tested solutions, while Aruba has built a reputation for innovation in wireless and edge-to-cloud architectures. Both deliver reliable performance, but the best choice depends on your organization's size, priorities (e.g., simplicity vs. deep customization), and existing investments. Here's a clear breakdown of pros and cons, target audiences, and a SWOT overview. Pros and Cons of Aruba (HPE Aruba Networking) Pros: Strong emphasis on simplicity...