What is Cloud Computing? [EXPLAINED]

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Cloud is the global network of servers around the world acting as one massive hard drive. Cloud Computing is the delivery of different computing services through the internet. Many of us think Cloud Computing is just about storage, but it’s not. It also includes services such as servers, databases, software, analytics, networking, intelligence, etc. 

Instead of keeping files on a hard drive, cloud storage helps to store them online over the internet. We can access our data anytime, anywhere if we are connected to the internet. So, even if we lose or break our phones, data isn’t lost forever.

Cloud is like a server located at a remote data centre managed by Cloud Service Providers (CSP) such as Google Drive, Dropbox, OneDrive, etc. Users pay to these CSPs on a monthly basis according to their usage.

Cloud Computing Services

Software as a Service (SaaS)

  • SaaS basically allows cloud service providers to manage everything from infrastructure to applications. SaaS offers ready to use applications. Every file is available online, when you log in to your account.
  • SaaS users pay for a monthly or annual fee.
  • Examples: Dropbox, Google Drive.

Platform as a Service (PaaS)

  • PaaS provides a platform over which users can create software and build applications. Here the users are more likely to be developers.
  • Cloud service providers provide infrastructure and software framework but developers can develop and run their own application.
  • Examples: Google App Engine, Heroku.

Infrastructure as a Service (IaaS)

  • IaaS provides the basic infrastructure such as virtual servers, storage drives, operating systems. Users can avoid the need to buy software or servers.
  • IaaS offers the businesses the greatest level of control over software and hardware. 
  • It allows the businesses to pay only for the resources they use.
  • Examples: Amazon Web Services, Microsoft Azure.

Let’s understand this through an example of Pizza –

  • When we order a pizza, we don’t know who will make it, what devices the company needs to make the pizza. We simply pay for it and the delivery guy brings pizza to our home. Pizza Company manages all the services. This is the reference to SaaS, cloud companies manage all the services and we just pay for it.
  • Now, if we provide all the ingredients to the pizza company, the chef will only have to make the pizza with the help of all the devices like oven, refrigerator, etc. Just like that, in PaaS developers create software and Cloud providers provide a platform.
  • In IaaS, we purchase all the ingredients and make the pizza by ourselves, meaning we are the chef and the company only provides devices to make the pizza. This means Cloud providers provide the basic infrastructure and users have maximum control over the data

Types of Cloud Computing

Public Cloud

  • In public cloud computing, cloud resources such as servers, storage are shared to the public by providers over the internet. It supports multiple businesses.
  • It is connected to the public internet and hosted at a cloud provider site. 
  • Cloud is managed by providers and users use them.
  • Example: Google App Engine, Amazon Web Service.

Private Cloud

  • In private cloud computing, cloud resources are shared to private organizations by the providers over the internet. It supports only one business. 
  • It is connected to private networks only and hosted at a cloud provider site or at a business site.
  • It is managed and used by a single business.
  • Example: Microsoft KVM, HP.

Hybrid Cloud

  • Hybrid cloud is a combination of public and private clouds.
  • In hybrid cloud, sensitive activities are performed by private cloud and non- sensitive activities are performed by public cloud.
  • It provides flexible and secure resources.

Also Read: 5th Generation Technology (5G)

Global Cloud Computing market

Some Examples of Cloud

Google Drive

Google Drive is one of the most popular cloud services in the world. If you are a Google user then you automatically get a drive account. Most of the google services like Gmail, Google Calendar are considered cloud computing.

Amazon Web Service

Amazon web service (AWS) is the cloud platform offered by Amazon. It controls more than one-third of the cloud computing market. AWS has 85 availability zones within 25 regions around the world.

Also Read: What is API? Types of API & their applications

So, which provider will you choose for Cloud Computing? Leave a comment.

Thank you for reading this article!

References:

https://www.ibm.com/in-en/cloud/learn/cloud-computing

https://azure.microsoft.com/en-in/overview/what-are-private-public-hybrid-clouds/#deployment-options

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