Which vmkernel module implements the N-VDS on an ESXi transport node?
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A. B. C. D.C.
http://www.vstellar.com/2018/08/03/learning-nsx-t-part-8configuring-transport-zone-and-transport-nodes/The correct answer is C. nsxt-vswitch.
In VMware NSX-T Data Center, the N-VDS (NSX Virtual Distributed Switch) is implemented on ESXi transport nodes using the nsxt-vswitch vmkernel module.
The N-VDS is a distributed virtual switch that is managed by NSX-T Data Center and provides networking and security services to virtual machines and workloads. It enables the creation of overlay networks for virtual machines, allows traffic to be encapsulated and transported over an underlying physical network, and provides advanced networking and security features such as distributed firewalling, load balancing, and VPN.
The nsxt-vswitch vmkernel module is responsible for implementing the N-VDS on an ESXi host and providing connectivity to the overlay networks created by NSX-T Data Center. This module is automatically installed when an ESXi host is prepared for NSX-T Data Center and is used to create and manage the N-VDS on the host.
The other options listed in the question are not correct because:
A. openvswitch is not used by NSX-T Data Center to implement the N-VDS on ESXi hosts. Openvswitch is a popular open-source virtual switch that is often used in OpenStack environments.
B. etherswitch is not a valid vmkernel module in VMware ESXi. It is a term used to describe a physical network switch that operates at the Ethernet layer.
D. dvswitch is a vmkernel module used to implement the VMware Distributed Virtual Switch (DVS), which is a virtual switch that is managed by vCenter Server and provides advanced networking features for virtual machines. However, it is not used by NSX-T Data Center to implement the N-VDS.