What is Cloud Computing?
Cloud and cloud computing describes the use of IT infrastructures and services that are available via the Internet and rented as a service. These services include on the one hand storage space, for which the principle of the cloud is mainly known. On the other hand, they also include computing power or application software. Since they are not located on the local PC, laptop, or tablet, the user’s location does not matter. The latter can access the services from anywhere with the help of programs or a web browser.
The term cloud is short for cloud computing, which has become commonplace in our everyday lives. There is no difference between the terms.
How does cloud computing work?
Cloud computing is based on a principle that is quickly explained: service providers make servers available to customers in the form of virtual data centers. Customers can expand their storage requirements as needed. The advantage: every user has online access to the cloud and thus to the data, software or computing power at any time. It is also possible to set up an internal data center with servers.
The classification of cloud computing
The cloud can be divided into different models based on its use. A distinction is made between service models, delivery models and the characteristics.
The service models of the cloud:
On Premise
With the on-premise solution, all data is hosted and managed on internal servers. This is an optimal solution especially for companies with high data protection requirements.
Infrastructure as a Service (Iaas)
With Infrastructure as a Service (IaaS for short), a cloud provider makes IT resources available. These can be servers, storage or other network components, for example. Probably the best-known representatives on the market are Amazon Web Services (AWS) and Microsoft Azure.
Platform as a Service (PaaS)
Platform as a Service (PaaS for short) is a cloud offering in which users are provided with a platform in which they can create and run applications themselves. In addition, the service provides a set of developer tools for creation. The best-known examples here are SAP Cloud and Google App Engine.
Software as a Service (SaaS)
In the Software as a Service (SaaS) service model, the user gets access to the provider’s software in the cloud and can use it from anywhere. This does not require software to be installed locally on the computer. Popular examples of SaaS are MailChimp and Slack.
Ownership of the service models is decreasing from the on premise solution to the software as a service model.
The classification of the cloud into deployment models or delivery models
Private cloud – for reasons of data protection and security
Many companies prefer to operate and host their IT services themselves for reasons of data protection and IT security. They maintain their own servers and make the respective applications and storage options available to their employees via the web browser. These services are often only accessible on their own intranet or via a virtual private network (VPN). This type of data storage is the private cloud.
Alternatively, a private cloud can also be set up with a public cloud provider. In this case, a separate area is installed that is also physically separated from the other services. The services and applications preferred by the company are provided in this area.
The private cloud can also be classified into different types:
Public cloud – the most common form of cloud
The public (public) cloud is the most commonly used cloud service. A provider makes the required resources (storage space, computing power, software) publicly available to all users as a service:
Probably the best-known examples are e-mail providers such as GMX, Hotmail or Web.de. Google Docs, but also the paid services of Microsoft Office365 are among them. The advantage of the public cloud is that the company’s own IT infrastructure and software become superfluous. High investment costs can therefore be avoided. However, the public cloud has a disadvantage in terms of data protection. The data is stored on the servers of the respective cloud provider, such as Dropbox, OneDrive, iCloud or GoogleDrive. Thus, this type of cloud has absolute data protection relevance.
The hybrid cloud – combines the advantages of a private and a public cloud
In every company, there is data that absolutely must remain in-house due to its sensitivity and data protection relevance and therefore needs to be specially protected. These are then provided via a private cloud. However, certain services can be outsourced to a public cloud. In this way, the use of a hybrid cloud approach results in a high degree of flexibility, while the requirement for data protection and security is also satisfied.
As a rule, the higher expenses due to the more complex infrastructure have a disadvantageous effect. The configuration and management of a hybrid cloud are significantly more complex than when using a private or public cloud. The risk of data being stored in the wrong part of the cloud can usually never be completely ruled out.
The underlying security strategy must necessarily follow an end-to-end approach. Check exactly what data you generate, process and store. You must also analyze every process for security and function. This is the only way to avoid errors.
Other cloud delivery models:
The advantages of cloud computing
The plus points of the cloud can be summarized in three main advantages:
The most well-known advantage of the cloud is flexibility. Users can customize the cloud according to their needs. For example, the cloud can be scaled down or up as needed. But the delivery model is also customizable. For larger companies, the on-premise solution is particularly popular. Here, the cloud servers are hosted in the company’s own premises. This solution is particularly interesting for companies with high data protection regulations. Another important point of flexibility is encryption. Above all, secure end-to-end encryption offers data extra protection. Particularly sensitive data can therefore also be stored in the cloud.
Another advantage of cloud computing is efficiency. With the help of web apps and mobile apps, you can access the data from anywhere. In addition, online storage is also frequently used as a backup solution. This way, hardware damage cannot lead to data loss as quickly.
Other advantages include:
The right choice of cloud provider
The topic of cloud computing is interesting for you as a company if your employees need to access the same data at different locations. At the latest then your IT department should think about cloud computing. Choose the right cloud service for your company based on the planned application. When choosing a cloud provider, they should consider the following points.
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