Arista CAB-Q-Q-3M is a 40G QSFP+ passive direct-attach copper (DAC) twinax cable, 3 meters long, with pre-terminated QSFP+ connectors on both ends. It provides a single 40 Gbps link for short-reach interconnects between 40G QSFP+ ports on Arista switches or servers, avoiding optics for compatible setups. As a passive copper cable, it contains no active electronics and requires no external power, making it a straightforward, low-latency option for rack-to-rack or switch-to-switch connections within data centers. This specific 3-meter cable is listed by Arista as CAB-Q-Q-3M, a 40G QSFP+ to QSFP+ twinax copper cable of that exact length.
