What is Cloud Service? Benefits and Suitable Deployment Models for Businesses

In 2026, global spending on cloud computing services is expected to exceed USD 800 billion according to Gartner forecasts, while more than 90% of businesses have adopted at least one form of cloud technology in their operations. So, what is Cloud Service, and why has it become a core technology infrastructure for modern businesses? Viettel IDC will provide comprehensive answers about cloud services in the following article.

What Is Cloud Service?

Cloud Service, or cloud computing service, refers to IT resources such as servers, storage, databases, and software that are provided on demand over the Internet by third-party providers (AWS, Google Cloud, Azure, etc.). Users only pay for what they use, eliminating the need to invest in, manage, and maintain on-premises hardware and physical infrastructure.

In Vietnam, the cloud computing market is experiencing rapid growth, estimated to reach USD 3.575 billion in 2024 and USD 9.102 billion by 2033. The Vietnamese government and businesses are actively developing digital infrastructure, with cloud services serving as an important pillar. Even in specialized fields such as national defense, cloud computing is being applied to share and store large volumes of data, supporting military logistics and operational activities.

What Are the Benefits of Using Cloud Services?

Amid rapid digital transformation, Cloud Computing Services are no longer merely a trend but have become a core infrastructure platform for modern businesses. According to Gartner, more than 85% of businesses worldwide were expected to adopt a cloud-first strategy by 2025, demonstrating the widespread adoption and growing importance of cloud computing services.

- Access Anytime, Anywhere: Cloud Services allow users to remotely access and manage resources over the Internet whenever a network connection is available. Employees can work flexibly, access data, or run applications whether they are in the office or working in the field.

- Flexible Scalability: Businesses can scale resources up or down (CPU, RAM, storage, etc.) with just a few actions in the service management interface, immediately responding to sudden increases in resource demand. Cloud scalability prevents systems from becoming overloaded and helps minimize performance degradation, particularly when traffic fluctuates unpredictably.

- High Availability: Cloud infrastructure is typically designed with multiple layers of redundancy. If a server or data center experiences a failure, workloads can be transferred to other available resources without interrupting users.

- Cost Savings: Businesses do not need to make large capital investments in hardware or build and maintain data centers. Instead, they only pay for the resources they use. The cloud's pay-as-you-go pricing model helps optimize initial investment costs and reduce IT operating expenses.

- Data Security and Redundancy: Many Cloud Service providers implement data encryption, firewalls, multi-factor authentication, and automated cloud backups. At the same time, backing up and replicating data across multiple geographic regions ensures rapid recovery in the event of a disaster or system failure.

Examples of Popular Cloud Services Today

To better understand what Cloud Service is, you can think of the following groups of cloud computing services that are widely used in practice:

- Cloud Storage: Allows users to remotely store and access data over the Internet without relying on physical hard drives. Popular services include Google Drive, Dropbox, and Microsoft OneDrive.

- Cloud Server: Provides virtual servers that businesses can rent and operate remotely with configurations that can be flexibly adjusted according to their needs. Notable examples include Amazon Web Services, Microsoft Azure, and Google Compute Engine.

- Cloud Software: Provides fully functional applications over the Internet, allowing users to access them directly without installing them on personal computers. Familiar platforms include Microsoft 365 and Adobe Creative Cloud.

- Cloud Platform: Provides environments for building, testing, and deploying applications without requiring users to manage the underlying infrastructure. Notable services include Microsoft Azure App Service and Google App Engine.

Main Types of Cloud Services

In cloud computing, the three most common types of Cloud Computing Services are IaaS, PaaS, and SaaS. These three models provide different levels of control and convenience:

Infrastructure as a Service (IaaS)

IaaS provides virtualized IT infrastructure resources (virtual servers, storage, and networking) through the cloud. Users have full control over and can customize system software, applications, and operating system configurations on virtual machines.

This model is suitable for businesses that want deep control over their infrastructure without investing in physical servers. Examples include renting virtual servers from AWS EC2, Azure Virtual Machines, or Viettel Cloud Server.

Platform as a Service (PaaS)

PaaS provides ready-to-use environments for application development and deployment. PaaS providers are responsible for managing the platform (operating systems, databases, and deployment tools), allowing developers to focus solely on writing code.

With PaaS, developers do not have to worry about hardware configuration or system software updates, thereby shortening the time required to bring applications into operation. Examples include Google App Engine, Heroku, and Cloud Foundry services offered by domestic cloud providers.

Software as a Service (SaaS)

SaaS provides fully functional applications deployed and operated on cloud platforms. End users access these applications through a web browser or application without having to install them.

The provider is responsible for updating, maintaining, and ensuring the security of the applications. Common examples include Google Workspace, Microsoft 365, Salesforce, and business management, accounting, and CRM applications in Vietnam such as MISA SME and AMIS by Sun.

Popular Cloud Service Deployment Models

The most common Cloud Computing Service deployment models today include Public Cloud, Private Cloud, and Hybrid Cloud. Each model has its own advantages and disadvantages to meet different requirements:

Public Cloud

Public Cloud is a model in which the entire infrastructure (servers, storage, networking, and platform software) is owned and operated by a service provider over the public Internet. Resources are shared among multiple customers while maintaining logical isolation through virtualization mechanisms.

Advantages

- Helps businesses reduce initial investment costs by eliminating the need to purchase physical infrastructure

- Allows flexible payment based on the actual resources used

- Supports rapid scaling up or down of configurations according to demand

- Systems can be deployed and brought into operation within minutes

- Suitable for startups, SMEs, and systems requiring flexible scalability

Disadvantages

- Businesses do not have full direct control over the underlying physical infrastructure

- There is a relatively high level of dependence on the provider's operational capabilities and policies

- Critical data may be exposed to risks if security configurations are not properly implemented

- Costs may increase unexpectedly if resources are not regularly monitored and optimized

Private Cloud

Private Cloud is a cloud computing infrastructure model dedicated to a single organization. All resources are isolated from other customers and can be deployed in an internal data center (on-premises) or rented from a provider in a completely isolated environment.

Advantages

- Full control over data and infrastructure

- High level of security

- Easy customization to meet specific requirements

- Suitable for core systems such as Core Banking, ERP, and national data systems

Disadvantages

- High investment and operating costs

- Longer deployment time

- Resource expansion requires additional hardware investment

- Requires a highly specialized IT team

Hybrid Cloud

Hybrid Cloud is a model that combines Public Cloud and Private Cloud within an integrated architecture. Businesses can store critical data in a private environment while leveraging public resources to scale up when there are sudden increases in workload.

Advantages

- Enables flexible resource allocation and orchestration across different system groups

- Helps optimize budgets by leveraging the strengths of both public and private environments

- Makes it easier to scale infrastructure as the business grows or traffic increases suddenly

- Reduces the risk of complete dependence on a single provider

Disadvantages

- More complex architecture compared with a standalone model

- Requires strict management and data synchronization between environments

- Requires highly skilled technical teams for effective operation

- Initial deployment and integration costs can be relatively high

Key Parameters to Consider When Deploying Cloud Services

When deploying cloud services, businesses need to consider various technical and non-technical parameters to ensure effective service operation. The following table summarizes some key parameters and their meanings:

Most Trusted Cloud Service Provider Today

Viettel IDC is one of the leading cloud computing service providers in Vietnam and is a subsidiary of Viettel Group. The company operates an international-standard Tier III data center system with modern infrastructure, ensuring availability of up to 99.99%.

Viettel IDC provides a wide range of solutions, including Public Cloud, Private Cloud, and Hybrid Cloud, meeting the needs of businesses ranging from SMEs to large enterprises and government agencies. With strong security capabilities, international certifications, and a team of specialized engineers, Viettel Cloud Server is a trusted choice for businesses looking to deploy cloud computing securely and sustainably.

Conclusion

Through this article, you now have a clear understanding of what Cloud Service is, its deployment models, practical benefits, and the key parameters to consider when choosing a cloud computing service. In the era of digital transformation, cloud technology is no longer merely a trend but has become essential infrastructure that helps businesses optimize costs, improve scalability, and ensure continuous operations. Choosing the right model and Cloud Services provider will determine the long-term effectiveness of a business's digital transformation strategy.