The NCS-57D2-18DD-SYS breaks new ground by combining 7.2 Terabits of 400GE/100GE optimized forwarding capacity, high power efficiency, QSFP-DD optics, deep packet buffering, full line-rate MACsec*, IPSec*, Class C 1588 Precision Time Protocol (PTP), and Synchronous Ethernet (SyncE) in an extremely power-efficient, 2-rack-unit package.