Cloud infrastructure is the operating base beneath cloud services

Cloud infrastructure is the hardware and software that supports cloud services: data-center servers, storage and network equipment, plus software that turns those assets into resources customers can configure over the internet. Providers operate the underlying resources and offer on-demand access, commonly through usage-based payment. It is the foundation beneath cloud computing, rather than a catch-all name for every application delivered from the cloud.

What sits inside cloud infrastructure

The stack has two layers. The physical layer is equipment in data centers: servers for processing, storage devices for persistent data, and networking equipment that connects systems and carries traffic. The abstraction layer includes virtualization software, management tools and interfaces that make those resources available as virtual services.

• Compute runs workloads, including virtual machines and containers. Virtualization allows resources to be dynamically allocated and reconfigured.
• Storage keeps workload data persistently. Capacity, regional availability and storage type can be adjusted for a workload; block storage is one option for applications requiring fast read and write performance.
• Networking connects applications, services, data and users across servers and data centers. Switches, routers and load balancers are part of this layer, and providers use networking equipment to establish communication channels and manage traffic.
• Security capabilities can include encryption, authentication, access control and monitoring.
• Management interfaces are used to monitor, configure and scale resources.

Cloud infrastructure versus cloud computing

Cloud infrastructure is the environment and components that host workloads. Cloud computing is the delivery of computing services over the internet, including processing, storage, databases, software applications and related capacity. An employee using cloud email or office software is consuming cloud computing. An engineering team creating virtual machines, network connections and persistent storage is working closer to the infrastructure layer.

Infrastructure as a service, or IaaS, is an example of this distinction. An organization rents compute, storage and networking on demand instead of purchasing and maintaining physical hardware.

Cloud infrastructure deployment models

The deployment model describes who uses the infrastructure and where workloads run.

• Public cloud is a multi-tenant model in which multiple organizations share provider infrastructure.
• Private cloud uses infrastructure dedicated to one organization.
• Hybrid cloud combines a private cloud or on-premises environment with public cloud. Data and applications can move between the environments.

How cloud infrastructure is consumed

In Eurostat's enterprise survey, cloud services have three characteristics: on-demand self-service, elasticity and payment. Self-service means users can request computing resources without human interaction with the provider. Elasticity means capacity can scale up or down as demand changes. Services may be paid per user, per use or in advance.

In the European Union, 52.74% of enterprises used paid cloud-computing services in 2025, according to Eurostat. That measures enterprise use of paid cloud services in the EU, not the global cloud-infrastructure market. Among EU enterprises buying those services, 85.15% used cloud email, 71.69% used office software, 71.53% stored files, and 28.18% bought cloud computing platforms to run their own business software applications.

A workload-first assessment

Start with the workload, then identify the infrastructure needed to run it:

1. Compute: the execution environment required and how demand changes.
2. Storage: persistent-data volume, performance and availability requirements.
3. Connectivity: the users, services and data sources that must communicate, and how traffic will be managed.
4. Security and control: required authentication, access control, encryption and monitoring.
5. Placement: whether the workload belongs in public, private, on-premises or hybrid infrastructure.
6. Operations: how resources will be configured, monitored and scaled.

Frequently asked questions

What are the core components of cloud infrastructure?

Core components include servers and compute, storage, networking, virtualization software, security controls and management tools. Providers operate the underlying physical equipment in data centers, while virtualized resources are made available for workloads.

What is the difference between public, private, and hybrid cloud infrastructure?

Public cloud is shared, or multi-tenant, provider infrastructure. Private cloud is dedicated to one organization. Hybrid cloud combines private or on-premises infrastructure with public cloud, allowing data and applications to move between environments.

What is infrastructure as a service (IaaS)?

IaaS is a model in which an organization rents compute, storage and networking resources on demand instead of purchasing and maintaining physical hardware.

Sources

• What is Cloud Infrastructure? - AWS — aws.amazon.com
• Cloud IT Infrastructure: Everything to Know - Flexential — www.flexential.com
• What is Cloud Infrastructure? | Microsoft Azure — azure.microsoft.com
• Cloud computing - statistics on the use by enterprises — ec.europa.eu