Which required NSX component abstracts the physical network and provides access-level switching in the hypervisor?

The Distributed Logical Router (DLR) is the NSX component that abstracts the physical network and provides access-level switching in the hypervisor. The DLR enables routing between different virtual networks and operates at the hypervisor level, providing high-performance distributed routing capabilities.

References:

VMware NSX documentation.

Technical resources on NSX architecture and components.