Which four components are part of the Cisco Data Center Nexus switching offering? (Choose four.)

The Cisco Nexus 6000 Series Switch is a fixed-configuration data center switch, part of the Nexus product family designed for high-density 10/40 Gigabit Ethernet access and aggregation layers.

The Cisco ASR 9000 series is a service provider-focused aggregation services router, not a component of the Cisco Data Center Nexus switching offering.

The Cisco Nexus 1000v Switch is a virtual distributed switch that integrates with hypervisors, extending the Cisco Nexus networking features to virtual machines within the data center.

Cisco IOS Software is the operating system for Catalyst switches and routers, whereas Nexus switches specifically run Cisco NX-OS Software.

The Cisco 4500E Switch belongs to the Catalyst series, which is primarily for campus and enterprise networks, not part of the Nexus data center product line.

Cisco NX-OS Software is the purpose-built operating system that runs on all Cisco Nexus series switches, providing advanced data center features, virtualization, and programmability.

The Cisco 6509-E Switch is part of the Catalyst 6500 series, which is designed for campus core and distribution layers, not within the Nexus data center offering.

Cisco Fabric Extenders (FEX) are an integral part of the Nexus switching architecture, acting as remote line cards for Nexus parent switches to provide simplified cabling and management for server access.