What is cloud computing and how does it work?

The key idea is to transfer the infrastructure that used to be physically located in the company's office or data center to the cloud, i.e. to the provider's remote servers. With the help of special software (hypervisors, orchestrators, APIs), the client can quickly create, scale, and manage virtual machines, containers, or services without having to invest in their own hardware. Resources are paid for on a pay-as-you-go basis, making cloud computing a flexible and efficient IT tool. Clouds are based on virtualization, automation, and the concept of infrastructure as a service, which allows you to quickly adapt to changes in your business. The modern cloud computing system has become the foundation for the digital transformation of enterprises, institutions and even governments.

The main advantages and disadvantages of cloud computing

The main advantage of cloud computing is flexibility. Users can scale resources as needed, paying only for what they use. This is especially beneficial for businesses with uneven workloads or dynamic growth. Cloud computing also provides fast service launch, high availability, automatic data backup, and reduced physical infrastructure costs.

However, there are also challenges. Firstly, dependence on cloud computing providers - it is important to choose a partner carefully. Second, security issues may arise, especially when working with public cloud or international cloud computing providers. Also, cloud computing is not always cheaper in the long run - especially if the service architecture is not optimized for hosting. The balance between flexibility, security, and cost is the key to successful use of cloud computing technology in real business.

What deployment models does cloud computing work in?

There are three main types of cloud computing - public, private, and hybrid cloud.

A public cloud is an infrastructure provided by an external cloud computing provider that is accessible to many customers via the Internet. It is the most scalable and convenient for startups or companies seeking to quickly launch services without large investments. The public model is often used for GPU-based computing, where high performance is required for short-term workloads.

A private cloud is an isolated environment created for a single organization. It can be deployed either in your own data center or in a cloud computing hosting service that provides an appropriate level of control. This option is chosen by companies with high security requirements, strict regulations, or sensitive data.

A hybrid cloud is a combination of public and private infrastructure that allows you to flexibly distribute the load and store sensitive data in a more secure environment. The hybrid model is often used in complex environments, such as public sector cloud computing, where security is critical.

What is the difference between types of cloud computing?

Cloud computing is distinguished by the model of providing functionality - the so-called types of cloud computing or XaaS approaches (“Everything as a Service”). The main ones are IaaS, PaaS, SaaS, but in practice, specialized models are increasingly used: BaaS, DRaaS, DaaS and others.

• IaaS (Infrastructure as a Service) provides basic infrastructure resources: virtual servers, networks, and storage. The client has full control over the environment, OS, and software.
• PaaS (Platform as a Service) - provides a platform for developing, testing, and deploying applications. The provider manages the OS, databases, and runtime environment.
• SaaS (Software as a Service) - ready-made applications accessible through a browser or API. Users do not manage the infrastructure or platform.

Application services include:

• BaaS (Backup as a Service) - data backup to the cloud with centralized management, cloud computing protection and recovery.
• DRaaS (Disaster Recovery as a Service) - cloud-based disaster recovery of IT infrastructure with RTO/RPO support.
• DaaS (Desktop as a Service) is a remote workplace provided as a service with data storage in the cloud. It is actively used in education and during the transition to remote work.

XaaS Model Comparison Table

These models are often combined: for example, IaaS + BaaS for cloud infrastructure protection or SaaS + DRaaS for business-critical applications. The choice depends on the technical capabilities of the team, the automation goals, and the level of security the company wants.

How is my data protected in cloud computing?

Cloud computing security is one of the key factors when choosing a service provider. Modern providers implement a comprehensive multi-layered security system - from physical security of data centers to cryptography and isolation of virtual environments.

Data is encrypted both at rest (on disk) and during network transmission. Access to resources is regulated through role-based policies RBAC (Role-Based Access Control), multi-factor authentication and VPNs. For additional protection of critical data, enclave technologies (e.g., Intel TDX or AMD SEV) are used to protect data even while it is being processed in RAM, and confidential virtual machines are used to encrypt even RAM.

Such technologies are especially effective for GPU-based computing, where sensitive data is processed. Auditing, logging user activity and regular vulnerability scanning are also important. Companies can integrate cloud computing technologies into their own information security model, while maintaining control over encryption keys, access policies and incident response procedures. As a result, a properly configured system is not only as secure as on-premises infrastructure, but often surpasses it in terms of security.

What factors should you consider when choosing a cloud provider?

Choosing a cloud provider is a strategic decision that affects security, efficiency and scalability in your organization. First of all, you should evaluate reliability and technical capabilities: whether the provider has certified data centers (ISO 27001, Tier III, etc.), what solutions it uses, whether it supports GPU-based cloud computing, redundancy, encryption and isolation of environments.

The second important aspect is the jurisdiction and legal regime of the data. Cloud computing in the public sector or financial industry requires data to be locally hosted. It is important to choose vendors that have data centers in Ukraine, are not subject to foreign sanctions and allow integration into existing cloud computing systems.

You should also pay attention to the flexibility of tariffs, availability of Ukrainian-language technical support, high SLA (Service Level Agreement), the ability to integrate with Kubernetes, VMware, Veeam and monitoring systems. Availability of cloud computing servers that support confidential computing is another plus. Choosing a provider means delegating some control, so it's critical to evaluate their reputation, technical transparency, and alignment with your cloud hosting model.