> Faster only because the distances involved are short enough that the PHY layer adds significant overhead. This specifically mentions the 7130 model, which is

> Faster only because the distances involved are short enough that the PHY layer adds significant overhead. This specifically mentions the 7130 model, which is a specialized bit of kit, and which Arista advertises for (amongst other things): > Arista's 7130 applications simplify and transform network infrastructure, and are targeted for use cases including ultra-low latency exchange trading, accurate and lossless network visibility, and providing vendor or broker based shared services. They enable a complete lifecycle of packet replication, multiplexing, filtering, timestamping, aggregation and capture. * https://www.arista.com/en/products/7130-applications https://www.arista.com/en/products/7130-applications It is advertised as a "Layer 1" device and has a user-programmable FPGA. Some pre-built applications are: "MetaWatch: Market data & packet capture, Regulatory compliance (MiFID II - RTS 25)", "MetaMux: Market data fan-out and data aggregation for order entry at nanosecond levels", "MultiAccess: Supporting Colo deployments with multiple concurrent exchange connection", "ExchangeApp: Increase exchange fairness, Maintain trade order based on edge timestamps". Latency matters (and may even be regulated) in some of these use cases.