Basically a hypervisor could be considered to be a virtual machine manager whose primary job is to take care of hardware virtualization. This allows multiple operating systems to run concurrently on a single host computer. These operating systems could also be considered to be as guests or clients and all of them are basically connected to a host computer. ESXi is one such hypervisor which boasts of its high reliability. ESXi also boasts of its improved security and manageability which is absent in maximum virtual machine managers available today.

A virtual machine manager basically provides a virtual operating system to the guests on the network. The execution of guest operating system and other terminals connected in the network is then managed by the aid of virtual machine manager or the hypervisor. It is the job of the ESXi to tackle with the management of operating systems of clients or guests in the network. ESXi is directly installed at the hardware without requiring assistance from any other operating system for installation, configuration and deployment. The hardware resources could then be shared with the aid of multiple instances, which are created, of the respective operating system on various terminals in the network. The virtual machine manager or the hypervisor, however, could only be installed on the server hardware that is capable of running and managing all the connected operating systems. This could pose a problem as virtualization of the entire network takes place with the aid of virtual machine manager or hypervisor located at the center which acts as the virtual server. In the event of disaster or power failure, if virtual server fails then the entire network might go down. In the case of unprecedented data loss, the data from the entire network might get affected. This situation could be tackled with the aid of creation of backups by backup ESXi.

Backup creation for the ESXi server could be done with the aid of backup ESXi. It is the prime concern of the backup ESXi to create restoration points in a persistent manner. Once these restore points are made storage is also the prime concern of the backup ESXi. Different storage devices are available with the help of which the data could be stored. Storage device are generally in the form of tape drives and compact storage devices where backup ESXi stores its data. These restore points assist in recovery if there is a change in the settings of ESXi server.