Description The Extreme Networks 10421 compatible 1m breakout cable provides high-density 100G connectivity for short-reach networking, splitting a QSFP28 port into four 25G SFP28 links. It is constructed with passive copper twinax to ensure reliable aggregated 100Gb/s signal transmission with ultra-low latency and zero power overhead. This assembly is an ideal choice for high-speed switch-to-server connections requiring maximum reliability.