Nexus Switches provide a quick and dependable switching infrastructure aimed at giving users the high performance needed for the virtualized environment in next-generation data centers.

With efficient designs, comprehensive feature sets, and high-performance across both modular and fixed-configuration switching platforms, Nexus switches provide the network foundation for a flexible and agile three-tier or leaf-and-spine architecture.

Definition and Purpose of Cisco Nexus Fabric Extender FEX acts as a remote line card for the Nexus switch, providing a scalable and flexible solution for data center connectivity. The purpose of Cisco Nexus FEX is to simplify network architecture and reduce the complexity of managing large-scale data centers.

A FEX (Fabric Extender) is a networking device that extends the capabilities of a parent switch by providing additional ports and forwarding traffic to and from those ports. It is typically used in data center environments to simplify network management and reduce cabling complexity.