||VMware vSphere as a suite of products that provides network virtualization services to hosts and VMs. vSphere links VMs to each other within a single host, connects VMs to the physical network, joins VMkernel services to the physical network, and provides networking for the management interface which runs management services for vSphere hosts.
||vCenter is a server that is installed on either Linux or Windows and provides central management of VMs and ESXi hosts.
||ESXi is also a component of vSphere. It is a hypervisor that defines processor, memory, storage, and networking resources into multiple VMs that run applications.
ESXi is installed directly on the server hardware, inserting a virtualization layer between the hardware and the operating system. ESXi partitions a physical server (pNode) into multiple secure VMs (vNodes) that run on the same physical server. Each VM represents a complete system, with processors, memory, networking, storage, and BIOS so that the operating system and applications can be installed and run in the VM without modification. VMs are also completely isolated from each other by the virtualization layer to prevent a crash or configuration error in one VM from affecting the others.
||A virtual CPU corresponds to one hyperthreaded core. Teradata Database on VMware requires hyperthreading be enabled.
|vSphere Virtual Switch
||The vSphere virtual switch lets you set up VM access switching from a centralized interface so you can provision, administer, and monitor virtual networking across multiple hosts and clusters.