What is Cloud: An Essential Overview

Nov 14,2022 by Akash Jaiswal

Databases and software that run on servers that can be accessed via the Internet are referred to as being in “the cloud.” Cloud servers are housed in data centers all around the globe. By using cloud computing, users and companies can avoid maintaining physical servers or using their own computers to execute applications.

Although by utilizing the cloud, users can access the same files and data from any device. This is because storage and computing take place on a server in a data center rather than storing on the local user device. Well, this is the main reason when a user login his Instagram account into his new phone after the breakout of the old phone. 

Consequently, he will get back all of his photos, videos, and conversation histories.  Likewise, it works in the same way for the cloud email service providers such as Gmail or Microsoft Office 365, and with cloud storage service providers such as Dropbox and Google Drive.

Businesses can save some IT expenses and overhead by switching to cloud computing. For instance, they can stop upgrading and maintaining their own servers. This is because the cloud vendor would take care of that for them. 

This is crucial for small businesses, which previously might not have been able to afford their own internal infrastructure but can now readily outsource their needs via the cloud. These days, the cloud can also make it simpler for organizations to operate internationally. It is because users can access the same data and applications from anywhere.

Different Types of Cloud Deployment


Deployment Model Description
Public Cloud Services are delivered over the public internet and are owned and operated by third-party providers. Resources are shared among multiple users and accessible to the public.
Private Cloud Infrastructure and services are maintained on a private network, dedicated to a single organization. It offers more control, security, and customization options but requires higher maintenance.
Hybrid Cloud Integrates both public and private cloud models, allowing data and applications to be shared between them. Provides flexibility, scalability, and allows sensitive workloads to remain on-premises.
Community Cloud Shared infrastructure among several organizations with shared concerns (e.g., security, compliance) typically within the same industry or community. Offers collaboration and cost-sharing benefits.
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Well, there are four types of cloud deployments that are the following.  So, let’s examine them:

1. Private Cloud:

A private cloud refers to a server, data center, or distributed network that is completely dedicated to a single organization.

2. Public Cloud:

A service offered by a third party that contains servers in one or more data centers is known as a public cloud. As opposed to private clouds, public clouds are utilized by many different businesses. Multiple businesses can rent server space on a single server, a situation known as “multitenancy,” where individual servers are shared by many businesses utilizing virtual machines.

3. Hybrid Cloud:

Public and private clouds, as well as conventional on-premises servers, are all combined in hybrid cloud setups. A business may use the public cloud as a backup for its private cloud or it may use the public cloud for some services while using the private cloud for others.

4. Multi-Cloud:

Using many public clouds is known as a multi-cloud deployment. In other words, a company using numerous clouds hires virtual servers and services from various outside suppliers. It is comparable to renting a number of close-by pieces of land from various landlords. Hybrid cloud deployments can be multi-cloud setups and vice versa.

Cloud Computing – How Does It Perform?

Due to the virtualization technology, cloud computing is possible. A “virtual” computer that behaves like a real computer and has its own hardware can be created via virtualization. Such a computer is referred to technically as a virtual machine. 

Despite sharing a physical system, correctly constructed virtual machines on the same host are sandboxed from one another, preventing any communication and preventing access to files and applications from one virtual machine by another virtual machine.

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Additionally, virtual computers make greater use of the hardware on which they run. One server becomes several servers by running numerous virtual machines concurrently. Whereas a data center becomes a network of data centers able to support numerous businesses. As a result, cloud service providers may grant access to their servers to a lot more clients simultaneously than they might otherwise, and they can do so for a reasonable price.

Cloud servers should always be online and accessible, even if some individual servers go down. Typically, cloud computing firms back up their services across numerous computers and locations.

Regardless of the device, users connect to the cloud over the Internet — that is, across many interconnected networks — to access cloud services via a browser or an app.

Core Models of Cloud Computing Services

Here, we are enlightening a few core models of cloud computing services. They are the following. So, let’s examine them.

1. SaaS (Software-as-a-Service):

SaaS (software as a service) applications are hosted on cloud servers. And also, it is accessed through the Internet rather than needing users to install a program on their devices. SaaS is comparable to renting a home in that the landlord maintains it while the tenant is allowed to use it just like their own. Salesforce, MailChimp, and Slack are a few applications of SaaS.

2. PaaS (Platform-as-a-Service): 

In this technique, businesses purchase the parts needed to build their applications rather than paying for hosted software. PaaS providers offer all of the infrastructure, operating systems, and development tools required to build an application via the Internet. PaaS is comparable to renting all of the construction tools and equipment rather than just the actual structure. Heroku and Microsoft Azure are examples of PaaS.

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3. IaaS (Infrastructure-as-a-Service):

In this strategy, a company hires cloud service providers to supply the servers and storage space it requires. Their applications are then built on top of the cloud architecture. IaaS is comparable to a company renting a piece of land on which to erect anything they choose. But, they are required to provide their tools and materials. DigitalOcean, Google Compute Engine, and OpenStack are a few main examples of IaaS.

SaaS, PaaS, and IaaS were the three primary cloud computing paradigms in the past, and almost all cloud services fell into one of these categories.

4. FaaS (Function-as-a-Service):

Well, it is also known as serverless computing. FaaS divide cloud applications into several small components. Those small components run only when they are required. For instance, consider renting one room at a time in a home. The renter would only be responsible for paying rent for the dining room when they are eating, the bedroom when they are sleeping, and the living room when they are watching TV.

Like other cloud computing platforms, FaaS or serverless apps continue to run on servers. Although they do not run on dedicated machines and the organization that develops them does not have to manage any servers, they are known as “serverless” applications.

Wrap Up:

In this era of digitalization, the cloud is booming all around the globe. This is all because of its numerous charming gains. Although, cloud computing helps users to avoid the maintenance of the physical server. Besides all of this, cloud computing is divided into four core categories. So, you can choose it according to the requirements of your business. Also, consider the above-mentioned models of cloud computing services. They will help you to grow your business globally.

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