Virtual desktop infrastructure (VDI) virtualizes desktop environments and applications and hosts them on remote servers that users can access over a network from any device. It separates the desktop environment from the client device used to access it. VDI provides a flexible, secure delivery model for desktops and improves efficiency, availability, security, and reduces costs through centralized management and optimized resource utilization. It allows users to access their full desktop environment from any location without being tied to a single device.

1. Virtual Desktop Infrastructure
What is virtual desktop infrastructure
 Desktop virtualization is software technology that separates the desktop environment
and associated application software from the physical client device that is used to access it.
Desktop virtualization can be used in conjunction with application virtualization and
(Windows) user profile management systems, now termed "user virtualization," to provide a
comprehensive desktop environment management system.
In this mode, all the components of the desktop are virtualized, which allows for a highly
flexible and much more secure desktop delivery model.
It is just like a group of desktop computers which are virtualized.
Virtual Desktop Infrastructure (VDI) is a desktop-centric service that hosts user desktop
environments on remote servers and/or blade PCs, which are accessed over a network using
a remote display protocol. A connection brokering service is used to connect users to their
assigned desktop sessions. For users, this means they can access their desktop from any
location, without being tied to a single client device.

2. Virtual Desktop Infrastructure
 The fig is showing the actual working of virtual desktop:-
 Here Active Directory (AD) is a directory service implemented by Microsoft for Windows
domain networks. It is included in most Windows Server operating systems.
 The motive behind VDI (Virtual Desktop Infrastructure) is to run desktop operating system and
applications inside virtual machines that resides on servers in the datacenter.
 This is referred to as virtual desktop.

3. Virtual Desktop Infrastructure
Architectural Overview
The virtual desktop infrastructure creates a framework that offers many advantages to the
enterprise such as :
Cost Reduction efficient use of resources can increase utilization.
Flexibility A common physical infrastructure can support a variety of end-users.
Security The data remains in the datacenter with access control.
Availability Due to higher availability as virtual machine can be quickly migrated to a different physical server in
the event of a hardware failure.
Efficiency Service delivery is more efficient when IT processes are optimized for a centralized environment.

4. Virtual Desktop Infrastructure
Virtual Desktop Infrastructure Enterprise Level
This VDI provides a group of proven integration patterns and methods for implementing a
client virtualization.
VDI solution (shared device, virtual client, workstation blades) is shaped by the component
selection.
VDI is generally used to reference the collection of products and infrastructure
components used to form a virtual desktop solution.
VDI is designed to reduce the dependency on distributed PC and laptops.
The VDI end user desktops runs on virtual machines hosted in a centralized IT
infrastructure in the client datacenter.
The VDI provides the increased security as no data leaves the data center.
Optional secure encapsulation capabilities can allow network connections to be encrypted.