Cloud computing has changed how many businesses operate. But how does the cloud work?
Cloud computing uses large servers in data centers to store data and make it accessible online. Users can upload, save, and retrieve data from their computers from anywhere in the world.
Cloud computing has several benefits for both the consumer and the business owner. Consumers can access their data more easily, and businesses save money by using cloud storage.
To help you understand the cloud, we will cover the basics of how it works and its benefits.
What is the Cloud?
The cloud is an infrastructure of server networks hosted in data centers placed worldwide. The system includes applications and databases running on connected servers, making resources available on users’ computers online. A cloud system uses a cloud environment instead of local hard drives to store data and programs.
Understanding how this infrastructure came to be helps explain why cloud computing has expanded so dramatically in the business world. The architecture of servers, data centers, and interconnected networks did not emerge overnight — it evolved over decades, shaped by shifting demands in computing power and connectivity. Tracing the origins and early milestones of cloud technology reveals how foundational decisions made years ago still influence the platforms organizations rely on today. A closer look at the origins and evolution of cloud technology provides valuable context for appreciating how rapidly businesses have embraced it in recent years.
Cloud computing’s rapid growth is clear from the success rate of businesses using it over the past few decades.
Modern companies often switch to cloud platforms for critical workloads. They prefer cloud servers over local servers to store data and focus on core activities for steady growth.
For a business view, read our article on cloud ownership and control, which explores who owns the cloud and its implications.
Cloud Deployment Options
The cloud can be deployed in three types based on where the system is located: public, private, and hybrid cloud.
Let’s look over how each of these deployment models operates:
- Public Cloud: It is the simplest and least expensive cloud deployment option where the on-demand/free IT services are open to anyone via the public internet. The cloud vendor owns and administers the infrastructure that incorporates hypervisor, physical servers, and more. The end-users manage the virtual network and can pay for their used services only. It runs on the multi-tenancy model, where multiple end-users share a single cloud resource/service isolated for each user. Though there remain some security issues in storing your company data on a public cloud platform, it is excellent in handling the basic operations.
- Private Cloud: The private cloud is available through a company’s encrypted network or VPN only to the verified users of that company. It is hosted on their physical server or a vendor’s off-premises data centers where the IT system is dedicated to that particular company entirely. The corporate or private cloud is a secure data storage option running within the user’s firewalls, where the user controls and owns the data.
- Hybrid Cloud: It is the most popular cloud model that has two deployment facilities: one public and one private cloud or one public and one on-premises system. So you can offload your less-sensitive business program and data to the off-premises public structure, use your on-premises server for handling sensitive business workloads, and move workloads between your server network for better flexibility. What is more impressive is you can provide your staff with a better and secure remote working environment allowing them to get company data not tied to a centralized system.
Service Models in Cloud Computing
Enterprises of all sizes are striving to upgrade their IT system and functionalities to meet customer demand better. Cloud computing is an evolving technology that aims to meet the needs of any business, no matter how complex.
SaaS (Software as a Service)
It is the widely adopted cloud service model where cloud providers deliver application or software programs on-demand that are accessible via various web browsers or apps.
Many SaaS services are free, but some need a subscription to use the resources. SaaS has led to a boom in the cloud market, where 80% of enterprises: big, medium, or small-sized, already employ at least one SaaS service to better execute their business operations. The popularity of the SaaS cloud can be better understood by a report by Gartner where it is estimated that SaaS will generate around $122.6 billion in 2021 and $141 billion in 2022.
Popular SaaS applications are system monitoring solutions, Field Service solutions, schedulers, etc., and relieve you from the hassle of the software/program upgrade or management, encrypting the network with security layers, besides ensuring your programs are always up for use.
Some popular SaaS applications:
- Microsoft Office 365
- Slack
- Google Docs
- Dropbox
- Salesforce, and more
PaaS (Platform as a Service)
It is a dedicated cloud service model where vendors offer access to development frameworks and computing environments hosted on their own infrastructure that comes with built-in software components: programming languages, operating systems, middleware, web servers, databases, etc., to enable users to design, test, deploy, and deliver everything: from a simple application to sophisticated cloud-based enterprise-grade software or web apps.
You can customize features with your subscription and avoid buying an IDE license and setting up complex IT infrastructure.
Some market-leading PaaS service providers are:
- Microsoft Azure
- Oracle Cloud Platform (OCP)
- Google Cloud
- Amazon Web Services (AWS) Elastic Beanstalk
- Salesforce aPaaS, etc.
IaaS (Infrastructure as a Service)
This cloud service model offers on-demand delivery of basic IT resources: data or application storage, hardware, networking, servers, etc., via the internet.
These IaaS services allow users to automate and manage complex infrastructure tasks. For instance, you can enforce policies for load balancing to improve your service performance and availability.
Automation is one of the most powerful advantages IaaS brings to modern organizations. Beyond load balancing, teams can automate provisioning, scaling, configuration management, and resource monitoring — all without manual intervention. Understanding the full scope of cloud infrastructure automation tools and techniques helps organizations make better decisions about which IaaS capabilities to prioritize. These automation features are typically bundled into the subscription services that IaaS providers offer, giving users a comprehensive toolkit from the moment they sign up.
Your subscription may include services like network monitoring, security, detailed billing, load-balancing, log access, data storage, backup, retrieval, and clustering.
How Does the Cloud Work?
As we have already stated, the basic functionality of cloud computing services is to let users hire virtual infrastructure from third-party vendors to use cloud services online instead of owning on-site physical servers.
But how does this system work and make businesses operate smoothly? Let’s have a look at the operating process of this revolutionary technology.
Cloud infrastructure uses virtualization technology to let providers run virtual computers. These virtual machines (VMs) are in the same data center but are isolated and do not interfere with each other. As multiple VMs run simultaneously in a cloud system, a single server acts as if it were a cluster of servers, and the data center acts as it hosts several data centers.
Hence, even if a server is down, your program is hosted by any other server of the interconnected system, as most cloud services ensure mirroring your files and apps on at least two remote servers of different locations.
There are two portions of a cloud system: backend and front-end.
The front-end in the cloud computing architecture is the part the users interact with. Its functionality is to enable end-users to access the services offered by a cloud service provider online. Most cloud services come with their individual web applications for seamless network access for their clients.
Front-end components are:
- Local internet networking systems
- Compatible devices the clients can use to reach their data.
- Web browsers
The backend is the core component of the cloud that is located in geographically placed servers and powers the front-end by processing and securely storing user applications.
Backend components are:
- Central servers
- The backend portion of the cloud software interface that allows users to interact with the cloud
- Databases
- Service, for instance, software development environments, storage, and web services. It is the most significant element of the backend and makes the cloud function.
- Storage: It houses the data that make the cloud computing software run optimally. Storage includes SSDs, hard drives, etc.
The entire cloud architecture is controlled and administered by the central server that operates based on set protocols and runs middleware to ensure connectivity among the interconnected computers. It is where server virtualization comes into use. Virtualization ensures maximum usability of each server and limits the requirement of physical machines.
Benefits of Cloud Computing
Though cloud computing has been present for the last two decades, organisations worldwide are forsaking traditional on-site IT systems and turning to the cloud rapidly in recent years. A study conducted by the International Data Group says 69% of total enterprises worldwide already depend on cloud technology largely, and 18% of them plan to shift their business workloads to the cloud in the near future.
But why is there a sharp increase in the use of cloud systems? Let’s look over the benefits that come with cloud technology:
Cost-savings
The most impressive feature of cloud technology is it requires zero/minimum upfront cost to implement a cloud model and use the resources. Of course, you have to spend on a quality cloud service you want to use to handle your data storage or workloads, but considering how it improves your business efficacy and enhances ROI, the expenditure is really negligible compared to traditional physical servers.
If you want to implement an in-house dedicated server, you have to spend on software licensing, hardware, physical servers, utility, billing, and more. Moreover, you have to hire expert IT assistance to ensure the system is running optimally. But with a cloud server, you can simply lease the cloud resources from a verified cloud vendor and save on capital and operating costs.
Moreover, the service providers ensure system administration and automatic software updates, including security updates. So you can skip the worry of system maintenance and upgrade and focus on boosting business productivity.
Big Data Analytics
Analysing both structured and unstructured data is crucial if you want to stay ahead in business competition. You can boost the functionality of your local data warehouse or add more servers to handle the fast-increasing analytics demands as your business grows and generates more data of various kinds. But no matter how much you spend on improving your on-site IT system, it may eventually fail to keep up.
Thanks to cloud technology that can facilitate the processing and analysis of your massive volume of data from multiple sources faster and extract actionable insights for improved business productivity.
Various cloud-based big data analytics tools have made big data mining less expensive and come with many in-built predictive models to let you skip the hassle of data processing and better focus on the outputs.
Data Security
Data security is a prime concern that hinders business owners from switching to cloud platforms. Cloud services come with expert monitoring and layers of protection to ensure your system and files cannot be breached and avoid cyber attacks.
Some security measures cloud services come with include:
- Real-time network and traffic monitoring
- Implementing advanced firewall technologies and standard encryptions like SSL/TLS.
- Access management to allow the data owner to let employees access or restrict them from accessing business-critical files.
- Malicious IP and malware detection
- Traffic filtering and more
A survey run by RapidScale found that while 94% of the evaluated enterprises reported they experienced better data protection after implementing the cloud, 91% stated the cloud made it effortless for them to comply with regulations.
Scalability
Another surpassing advantage of cloud technology is it offers scalable service, meaning that you can customize your resource usage according to your business demand without any upfront infrastructure investment.
You do not have to spend a fixed amount on a hardware setup for its maximum usability in a cloud system; instead, you can upscale or downscale your cloud resource consumption as your requirements fluctuate and pay for what you use only.
Seamless Collaboration
Cloud systems enable businesses to offer remote yet flexible working environments to their staff. Verified users can save and access business data and share or download/upload files from anywhere in the world with any device: smartphone, computer, or tablet via the internet.
Moreover, cloud environments facilitate company expansion by allowing co-users to collaborate in real-time and work on a particular document simultaneously.
