What is Cloud:
"Cloud" refers to servers that can be accessed via the Internet, as well as the software and databases running on these servers. Cloud servers are located in data centers around the world. Using cloud computing, users and companies do not have to manage physical servers or run software applications on their computers. The cloud allows users to access the same files and applications from almost any device, because computing and storage are performed on servers in the data center, instead of on the client's gadget. This is one reason why users can log in to their Instagram account on the new phone after the old phone is broken and still find the old version and all the photos, videos and conversation history. It works the same way as cloud email providers like Gmail or Microsoft Office 365 and cloud storage providers like Dropbox or Google Drive.
Why is it called cloud computing?
The basic concept behind cloud computing is that the service's location and many details (such as the hardware or operating system running the service) have nothing to do with the user. With this in mind, the cloud metaphor is borrowed from the old telecommunications network diagram. The public telephone network (and later the Internet) is usually represented as a cloud to show that justice doesn't matter-just a bunch of things. Of course, this is too simple; for many customers, the location of their services and data remains a crucial issue.
Cloud Deployment Models:
There are three main types of cloud environments, also known as cloud deployment models. Companies can choose to run applications on public, private or hybrid clouds based on their specific requirements.
Outsourced cloud providers own the public cloud environment, and many companies can access it via the Internet through a pay-per-use model. This deployment model provides services and infrastructure for companies that want to save IT operating costs, but the cloud provider is responsible for creating and maintaining resources. Public cloud is ideal for small and medium-sized enterprises with tight budgets and needs a fast and easy platform to deploy IT resources.
Pros of a public cloud
Cons of a public cloud
This cloud deployment model is a customized infrastructure owned by a single enterprise. It provides a more controllable environment in which access to IT resources is more concentrated within the enterprise. The model can be hosted externally or managed internally. Although private cloud hosting may be expensive, for large enterprises, it can provide a higher level of security and greater autonomy to customize storage, network, and computing components to suit their IT needs.
Pros of a private cloud
Cons of a private cloud
For companies seeking the benefits of both private and public cloud deployment models, the hybrid cloud environment is a good choice. The hybrid cloud model can provide tailored IT solutions that meet specific business needs by combining these two models.
Pros of a hybrid cloud
Cons of a hybrid cloud
There are three fundamental service models for cloud computing - Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). There are apparent differences between the two in terms of storage and resource pools, but they can provide services. Still, they can also interact with each other to form a comprehensive cloud computing model.
IaaS (Infrastructure as Service)
This is the most common cloud computing service model because it provides the necessary infrastructure of virtual servers, networks, operating systems, and data storage drives. It provides the flexibility, reliability, and scalability that many companies seek in the cloud, and eliminates the need for hardware in the office. This makes it an ideal choice for small and medium-sized organizations looking for cost-effective IT solutions to support business growth. IaaS is a fully outsourced pay-per-use service used as a public, private or hybrid infrastructure.
This is where cloud computing providers deploy infrastructure and software frameworks, but companies can develop and run their applications. Web applications can be created easily and quickly through PaaS, and the service is flexible and powerful enough to support them. PaaS solutions are scalable and very suitable for business environments where multiple developers work on a project. It is also very convenient for situations that need to utilize existing data sources (such as CRM tools).
SaaS (Software as a Service)
This cloud computing solution involves deploying software over the Internet to various businesses that pay for the subscription or pay-per-use models. It is a valuable tool for CRM and applications that require a lot of web or mobile access (such as mobile sales management software). SaaS is managed from a central location, so companies don't have to worry about maintaining it themselves; it is ideal for short-term projects.