Introduction to Infrastructure as a Service (IaaS)

Introduction to Infrastructure as a Service (IaaS)

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Updated on Feb 28, 2024 14:48 IST

Cloud computing has changed the way businesses operate. Cloud computing for business has grown significantly in recent years. This transition has benefited many businesses. The most appealing cloud feature for businesses is the ability to perform without needing their infrastructure.

Infrastructure as a Service (IaaS)

Computing infrastructure was a key differentiator for many brands. Companies with their computing clusters were able to advance in the industry, causing many problems for their competitors. But everything changed because of the IaaS. IaaS full form is Infrastructure as a service.

This article will discuss Infrastructure-as-a-Service (IaaS) in great detail. So, what is Infrastructure as a Service? Before we answer this question, let’s go over the topics that we will be covering in this blog:

What is IaaS? 

In IaaS, the cloud provider manages IT infrastructures such as storage, server, and networking resources and delivers them to subscriber organizations via virtual machines accessible via the internet. (IaaS) Infrastructure as a service, along with (SaaS) software as a service, (PaaS) platform as a service, and serverless, is one of four cloud services.

You can also explore: Introduction to Cloud Computing

Organizations can save a lot of money on various aspects, such as hardware costs and on-premises data center maintenance, and gain real-time business insights by migrating their infrastructure to the IaaS model. As a result, an organization can reap various benefits, including the potential for faster, easier, more flexible, and cost-effective workloads.

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To summarize and define IaaS, we can state that: IaaS in cloud computing is a service that allows customers or organizations to outsource their IT infrastructures such as servers, networking, processing, storage, virtual machines, and other resources on the Internet using a pay-as-per use model.

IaaS architecture

A cloud provider hosts the infrastructure components typically found in an on-premises data center in an IaaS service model. Typical components that may be incorporated into a cloud computing environment under the IaaS model of IT resource delivery include processing capacity and data storage.

IaaS architecture, like traditional computing network design, strives for maximum efficiency in delivering computing services to end users. This necessitates an architecture and design that offers a high availability pool of cloud-based IT resources while also delivering its resources in a flexible or scalable manner, particularly during high-demand periods.

It is critical to recognize that the architectural design of an IaaS solution is influenced by the specific requirements and goals of each organization that delivers IT resources through the cloud. A private enterprise, for example, will typically require a different IaaS architecture than an IaaS vendor for whom the solutions and service offerings are driven primarily by revenue concerns.

An organization must evaluate its ongoing and prospective IT strategy carefully. This should be done so that the organization can be sure that the layout of the IaaS architecture they are planning to use meets their current need and, at the same time, retain the ability to invest in a constantly changing model of cloud IT service delivery.

How does IaaS work?

An organization may use cloud providers such as AWS, Google Cloud, Microsoft Azure, Alibaba Cloud, and others to obtain services such as computing, storage, and databases. These services are provided by the cloud provider, who hosts hardware and software in the cloud. As a result, an organization can save money on various aspects such as purchasing, managing, or hosting their equipment. And as an additional bonus, organizations can choose the pay-as-you-go model, which saves a significant amount of money by allowing organizations to pay only for the resources they use. It’s a simple idea: if they use fewer resources, they will pay less; if they use more resources, they will pay more.

Features of IaaS

IaaS features can be divided into compute, network, and storage.



The idea of IaaS computing starts with servers. Servers are potent systems or computers that are costly and difficult to maintain. Many of these physical, bare-metal servers are housed in data centers managed by an IaaS service provider. A hypervisor can be used to partition these physical servers into smaller virtual machines, and these virtual machines can run their operating systems and applications independently while getting power from a bare-metal server.


There are three types of storage: file storage, object storage, and block storage.

  • In file storage, data is stored as a single entity in the file.
  • Object storage treats saved data as a single entity with metadata and an identifier. Over a network, object storage is commonly used to store entire objects, such as image files, logs, or HTML files.
  • Data is saved as blocks of actual bytes or bits in block storage. It has benefits over object or file storage, such as faster data transmission.


The network function interacts with and connects all components, such as storage, containers, virtual machines, servers, the internet, and the intranet. Networking ensures that data is moved through the architecture regardless of endpoints.

Load balancer

You can either increase or decrease your storage server space on demand with Infrastructure as a Service. IaaS is entirely scalable and adaptable to your specific needs and specifications. You can even use multiple copies of your servers, known as nodes.

Why is Infrastructure as a Service better than traditional computing network design?

In a traditional on-premises scenario, an organization manages and maintains its own data center, investing heavily in servers, storage, software, and other technologies. Aside from that, an organization must invest in hiring IT staff to purchase, manage, and upgrade all equipment and licenses. Aside from the money issue, they must also construct the data center to meet peak demand, even if workloads occasionally decline and those resources sit idle. If the workload increases rapidly, the IT department may struggle to keep up. As a result, it is far preferable to use cloud providers’ services, such as Infrastructure as a Service , which provides faster, easier, more flexible, and cost-effective workloads.

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Advantages of IaaS 

One of the more well-known benefits of IaaS is increased performance. The cloud provider’s infrastructure is typically more reliable, redundant, and robust than what would be financially feasible in an office environment. IaaS computing incorporates strict information security safeguards for private and sensitive data, such as end-to-end encryption and encryption at rest. As a result, security is enhanced.

Organizations experiencing rapid growth but lacking the capital to invest in hardware are excellent candidates for IaaS models. IaaS can also benefit businesses with consistent application workloads who want to remove some of the regular operations and upkeep of managing infrastructure.

Apart from these, the Infrastructure as a Service has various other advantages. Some of the most common ones are:

  • Reduce downtime: IaaS allows for immediate recovery from outages.
  • Reassign IT resources: Free up IT resources for higher-value projects.
  • Reduce capital outlays: IaaS is typically a monthly operational expense.
  • Self-service provisioning: Simple internet connection is required for access.
  • Pay only for what you use: Fees are calculated using usage-based metrics.
  • Future-proof: Access to cutting-edge data centers, hardware, and operating systems
  • Increased speed: Once IaaS machines are provisioned, developers can begin projects.
  • Dynamically scalable: Add capacity quickly during peak times and scale down as needed.
  • Increase security: IaaS providers make significant investments in security technology and expertise.
  • Level the playing field: Small and medium-sized businesses can compete with more giant corporations.

Disadvantages of IaaS

As every coin has two sides, there are numerous benefits and disadvantages to using IaaS in an organization. Some of these difficulties can be overcome with forethought and planning, but are still a few disadvantages that should be considered before implementing Infrastructure as a Service .

Some of those disadvantages are:

  • Lack of assistance: Getting live assistance can be challenging at times.
  • Runaway inventory: Instances can be deployed but not decommissioned.
  • Security risks: When direct control is lost, new vulnerabilities may emerge.
  • Vendor lock-in: Switching from one IaaS provider to another can be difficult.
  • Issues with availability: Even the largest service providers experience downtime.
  • Confusing SLAs: Service level agreements (SLAs) can be challenging to understand.
  • Broadband reliance: Only works well when you have a good internet connection.
  • Unexpected costs: Monthly fees can add up, and peak usage may exceed expectations.

IaaS providers 

Some of the most well-known Infrastructure as a Service providers are:

AWS: The Amazon Web Services (AWS) IaaS platform provides high-end APIs for handling low-level server tasks such as physical computing and data distribution. As a result, businesses save time by not having to maintain direct interaction with the infrastructure.

Microsoft Azure: By handling back-end procedures, Azure’s Infrastructure as a Service platform eliminates the need to handle low-end operations. The user interface is simple to understand and use, and Azure can incorporate Microsoft Office 365 and SharePoint. One of Azure’s key strengths is its responsive user community, which assists beginners in making informed decisions.

Google Cloud: Google Cloud platform is mainly popular due to its Google-backed features. Organizations can use pre-built operating systems and benefit from one-click boot-up time with Google Cloud as the vendor. On the Google Cloud platform, compute engine charges are based on per-second usage and are slightly lower than other cloud platforms.

Alibaba ECS: Alibaba offers a diverse range of dependable Infrastructure as a Service solutions to businesses in over 200 countries. Alibaba Elastic Compute Service (ECS) has fast memory and the most recent CPUs, sufficient to power cloud applications with the least amount of latency.


Infrastructure as a Service cloud computing foresees the worst-case scenarios for your enterprise cloud infrastructure. Recovery from a failed cloud infrastructure would be either impossible or prohibitively expensive for most organizations if they have not implemented Infrastructure as a Service. Most Infrastructure as a Service cloud service, providers organize their data and equipment in highly secure, always-on environments.

As a result, if your organization has not yet implemented IaaS, I recommend that you do so because IaaS service providers have all of the resources necessary to maintain the infrastructure, such as uninterrupted power, cooling equipment, and consistent network connectivity.


What is IaaS full form?

IaaS is an abbreviation for "Infrastructure as a Service."

What is another name for IaaS?

Because organizations or customers purchase managed IT infrastructure (hardware) access from a third-party cloud service provider, IaaS is also known as HaaS (Hardware as a service).

What are the three most important components of IaaS?

The three most important features of IaaS are compute, network, and storage.

Does IaaS include the infrastructure needed to support web apps?

Yes. IaaS includes the infrastructure needed to support web apps, such as storage, web and application servers, and networking resources.

What are some of the benefits of using IaaS?

Some of the benefits of IaaS include decreased downtime, self-service provisioning, paying only for what you use, future-proofing, increased speed, and so on.

What are some of the drawbacks of IaaS?

Lack of assistance, runaway inventory, security, vendor lock-in, availability, confusing SLAs, and so on are some of the drawbacks of IaaS.

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