Cisco built the next-generation data center class operating system designed for maximum scalability and application availability. The NX-OS data center class operating system was built with modularity, resiliency, and serviceability at its foundation...
http://www.ebrahma.com/2013/12/cisco-nx-os-features-overview/Labels: cisco-Nexus-features, how-is-NX-OS-different, NX-OS-feature-details, NX-OS-features, NX-OS-features-brief, NX-OS-features-overview, whats-new-in-NX-OS