Public Cloud – Definition and meaning
What is Public Cloud? Find out more about the public cloud and its benefits. Definition and importance of the public cloud in the cloud computing environment.
What is the public cloud?
The public cloud refers to a cloud computing model in which computing resources, storage and applications are provided over the internet by a cloud provider. This type of cloud service is available to the general public and is often used by companies and individuals to take advantage of flexible IT infrastructure and cost efficiency.
An overview of public cloud services
Public clouds are customisable and allow users to use services according to their individual requirements. The best-known providers include
- Amazon Web Services (AWS)
- Microsoft Azure
- Google Cloud Platform (GCP)
- IBM Cloud
- Alibaba Cloud
Advantages of the public cloud
Using public cloud services offers numerous advantages:
- Cost efficiency: you only pay for the services you use.
- Scalability: Resources can be added or removed quickly as required.
- Accessibility: Services can be accessed from anywhere with internet access.
- Maintenance ratio: Less internal maintenance as the cloud provider is responsible for the infrastructure.
Security aspects of the public cloud
Although public clouds offer many advantages, they also pose security challenges. The most important aspects include
- Data protection: Sensitive data should be encrypted and secured accordingly.
- Compliance: Companies must ensure that they comply with legal requirements regarding data storage and processing.
- Service level agreements (SLAs): Contracts with providers should include clear agreements on availability and response times.
Public cloud vs. private cloud vs. hybrid cloud
The public cloud differs significantly from other cloud models:
- Private cloud: a private cloud is set up specifically for an individual company or organisation and offers additional security and control.
- Hybrid cloud: This model combines public and private cloud services so that companies can switch between the two as required.
Illustrative example on the topic: public cloud
Imagine a small start-up needs flexible storage and computing power for its web application to cope with sudden traffic peaks on Black Friday. Instead of buying servers and infrastructure itself, the company decides to use the public cloud from Amazon Web Services. This allows the start-up to increase its resources in no time at all, without major investment or the need to maintain hardware. It can also reduce its resources again in the quieter months, which both saves costs and offers flexibility.
Conclusion
The public cloud offers companies and individuals the opportunity to access IT resources cost-effectively and flexibly. With the right security precautions, the benefits can be fully exploited while minimising risks. You can find more information about different cloud models in our encyclopaedia under Private cloud and Hybrid cloud.
Frequently asked questions
The public cloud is characterised by various key features, including the provision of computing resources and storage via the internet, accessibility for everyone and flexible adaptation to individual requirements. Users only pay for the services they actually use, which increases cost efficiency. The public cloud also enables rapid scalability of resources, allowing companies to react quickly to changing requirements.
The public cloud works by a cloud provider making computing resources, storage and applications available via the internet. Users access these services via their end devices without having to buy or maintain their own hardware. The provider manages the infrastructure, which means that users can focus on their core competences while the cloud platform provides the required performance and availability.
Several security aspects are important when using the public cloud. These include data protection, where sensitive data should be encrypted and stored securely. Companies must also ensure that they comply with the legal requirements for data storage and processing. The service level agreements (SLAs) are also crucial, as they set out clear agreements on the provider's availability and response times.
The public cloud offers companies numerous advantages, including cost efficiency, as they only pay for the services they use. It also enables high scalability, so resources can be added or removed quickly as required. A further advantage is accessibility, which makes it possible to access the services from anywhere with internet access, as well as reduced internal maintenance, as the cloud provider is responsible for the infrastructure.
The main difference between the public cloud and the private cloud lies in accessibility and control. While the public cloud is accessible to the general public and is used by many users simultaneously, the private cloud is designed specifically for a single company or organisation. This offers additional security and control over the data and infrastructure, which can be an advantage for companies with high security requirements.
Companies can use the public cloud effectively by analysing their specific requirements and selecting the right services. It is important to implement the right security measures, such as data encryption and adherence to compliance requirements. In addition, companies should regularly monitor their usage to maximise cost efficiency and ensure that resources are used optimally.
The leading providers in the public cloud market include Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP), IBM Cloud and Alibaba Cloud. These providers offer a variety of cloud services tailored to the needs of companies and individuals. Their extensive resources and global data centres enable users to benefit from flexible IT infrastructure and high availability.