Split a single 40GBASE-CR4 uplink into four 10GBASE-CU connections with a passive DAC built for short-reach aggregation. The 3 m length gives you enough slack for clean rack routing without adding the cost, heat, or power overhead of optics. Designed for Arista-compatible environments, this QSFP+ to 4 SFP+ breakout cable is a practical fit for top-of-rack to server fan-out, adjacent rack interconnects, and lab or staging networks that need predictable 10 GbE access from a 40 GbE port. Passive construction keeps the link simple: no external power, no transceiver management, and fewer parts to qualify. For infrastructure teams standardizing on direct attach cabling, this cable helps preserve switch port density while controlling spend. It is a straightforward choice when the job calls for short-distance breakout connectivity and you want the reliability of a fixed-length copper assembly instead of a modular optics stack.