Infrastructure- as- a Service (IAAS)

What is IAAS?

Infrastructure as a service (IAAS) is a cloud based service model. It is a pay- as- you- go service that offers data storage, networking, and virtualisation options. IAAS provides alternative opportunities to infrastructure thus eliminating the need for heavy investments on-site and the adjoining resources.

Cloud computing is becoming the norm. It is gaining a surge, worldwide, as they are providing endless growth and development opportunities for businesses. Cloud computing provides three service models, IAAS is one of them, the other two being Platform-as-a-service(PAAS) and Software as a Service (SAAS)It keeps companies from investing in infrastructure and labor-intensive processes.

The IAAS vendors provide infrastructure services like storage, networking, and servers while the applications, data, operating systems all are managed by users. Lesser hardware costs will be incurred for hiring IT vendors for hardware management and keep an IT person for keeping systems up to date. An Application Programming Interface (API) provides a dashboard allowing complete control of the cloud IAAS model.

When to opt for IAAS?

IAAS Supports buy as you need the model and with growing business one purchases more.

IaaS allows specific consumption of what they require while eliminating complex and expensive management tasks to their provider. Instead of providing discrete server, storage, and networking resources, the enterprise can streamline its actual hardware infrastructure while still providing the needed resources to serve the business model.

Infrastructure as a service (IaaS) is at times often termed as hardware as a service (HaaS).


IaaS is beneficial to businesses irrespective of their shapes and sizes, as it allows complete control over your infrastructure, and operates on a pay-as-you-use model, so it fits into most budgets. As investment in physical and IT, infrastructure has become unpopular, choosing IaaS alternatives is a safer, more reliable option.

IAAS is a general-purpose environment supporting production workloads and back-office operations will be optimized for live application support, rapid access, and active databases.

The IaaS model generally provides better pricing in contrast to internal infrastructure, costs can become unmanageable as scale increases. For this purpose, many organizations prefer third-party IaaS for temporary and specialized work while developing their cloud infrastructure as their data requirements mount.

Besides, start-ups often find IaaS a pocket friendly and a simplified way to launch their businesses, and then convert to private clouds — usually built on modular, compatible infrastructure — for their more critical workloads.

How did it work?

The service provider hosts the IaaS infrastructure components that are present in a data center including network hardware, servers, storage, and the virtualization of the hypervisor layer. The IaaS vendor offers a broad range of services to support the infrastructure components.

The Cloud

Likewise all the cloud computing services, IaaS provides the users the access to computing resources in a virtualized environment. This is accomplished by a public connection usually via the internet. IaaS allows access to the virtualized environment for establishing IT platforms.

Virtualized Hardware

IaaS provides specialized resources to virtualized hardware which is also termed as the computing infrastructure. The IaaS environment offers network connections, virtual server space, load balancers, and IP addresses.

Cloud Server 

The cloud service provider get the pool of hardware infrastructure from servers and networks that are typically spread across several data centers and therefore the cloud service provider controls all the resources.

IaaS providers also offer relative services to the users for supporting the infrastructure components that include monitoring, detailed billing, security, load balancing, clustering alongside storage services like data backup, replication, and recovery. IaaS technology aims at allowing users to implement higher levels of automation.  


  • Virtual Data Centers

A virtualized network therefore created consists of virtual servers that can be used for offering advanced cloud hosting experiences, allowing enterprise IT infrastructure or for assembling the operations.

  • Internal Business Networks

Utilizing a pooled server and networking resources is achieved through which a business can store data and run applications. Emerging businesses are strengthened to scale their infrastructure according to business growth.

  • Cloud Hosting

Hosting websites on virtual servers that have been developed on the pooled resources based on the underlying physical servers.


IAAS puts infrastructure control in the hands of the user. It has eliminated the prerequisite of having an external IT vendor. Infrastructure as a Service platforms are characterized by:

  • Pay Per Use

The IaaS enables on-demand service and the users only have to pay for the resources that are used.

  • Focus On Business Growth

Business owners usually have to spend a lot of time, money, and energy on making technology-related decisions and recruiting staff for managing and maintaining their IT infrastructure. By choosing a service-based Infrastructure as a Service model, business enterprises can concentrate their time and resources on where they are required.

  • Economical in terms of Cost and Time

As the cloud service supplier implements the setup and maintenance of the primary physical hardware required for supporting the Infrastructure as a Service environment it saves a lot of time and effort of the users and ensures affordability.

  • Smooth Service

There is no threat of a single point of failure in Infrastructure as a Service. Even if a single aspect of the hardware resources fails, the service will remain constant and uninterrupted.

  • Greater Reliability

Being an on-demand service model makes it easier to transfer workloads from one Infrastructure as a Service instance to another, ensuring that resources are always there when you need them;

  • Greater Security

The vendors maintain state-of-the-art security protocols as core elements of their business models

While the typical consumer model for Infrastructure as a Service is to acquire services from a third-party provider, many well-reputed enterprises are adopting it for their own internal, private clouds. It is built on virtual pools of resources which particularly are parceled out on-demand and then referred back to the pool when no longer needed.

Infrastructure as a Service may be a good model for workloads that are temporary, experimental, or that which amend unexpectedly. As an example, if a business is developing a replacement software package, it’d be more cost-effective to host and test the appliance using an service provider. Once the new code tested and refined, the business will deduct it from the service surroundings for a more traditional, in-house deployment. Conversely, the business may commit that piece of code to an extended Infrastructure as service deployment, wherever the worth of an extended commitment is additionally less.