Now that we have identified and conceptualized the types of cloud, let's see what are the advantages and the main applications of them.

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1. Private cloud

The private cloud is useful for industries that have few branches and do not want to depend so much on data communications over the internet, when performed in the company's own physical installation (the vast majority of cases). It is also used when the contractor wants to maintain his investment in assets (equipment) but seeks a more physically secure environment than his own facilities, allocating his equipment within private spaces in professional data centers. In general, this type of cloud is indicated for companies willing to invest in IT equipment and centralize the infrastructure in the headquarters or in professional data centers.

The private cloud obliges the client to hire a team (internal or outsourced) of specialists in IT infrastructure, with varied skills (virtualization, database, operating systems, maintenance and configuration of equipment and networks) and does not allow cost sharing of this team and equipment among several customers. It is usually limited to very large companies that have a centralized strategy for their IT. It can also be recommended in case of a great shortage of quality internet. It is important to note that private clouds have very high costs.

2. Public cloud

Unlike the private, the public cloud is for companies that want to avoid a centralized IT architecture. Today, in many cases, the architecture is still hybrid, in a progressive process of migrating applications from the on-premises environment to the public cloud.

The public cloud offers a very high level of security (physical and logical) and availability for the IT environment without having to invest in equipment and licenses, transferring IT expenses from CAPEX (Capital Expenditure, or capital expenses, are the costs acquisition of equipment and facilities) for OPEX (Operational Expenditure, or operating expenses, as it is an infrastructure contracted as a service, which allows constant adjustments), providing operational and financial flexibility.

The public cloud is always more economical than the others and it can offer a level of security much higher than local environments, as it has a wide structure to guarantee physical security, and several layers of logical security through software, appliances, backups and settings. Public cloud providers must operate in data centers with an international Tier-type certification to extend physical security. This type of cloud prevents companies from having to immobilize their capital in assets that are not part of their core activity, or even finance investments in new equipment, in a period when financing is expensive and scarce.

The Computer Network Support Specialists are the trained experts and are extremely helpful in the computer networking of an organization. They provide assistance and guidance to system users and businesses.

3. Hybrid cloud

The hybrid architecture allows to host each system in an environment according to the availability and security required, as well as the investment budgets and monthly costs defined by the company.

A point that draws attention when choosing a hybrid cloud is the difficulty and time to manage different environments. This complexity is also not restricted only to the operation, but to the financial requirements of allocating costs and investments, which become more complex to be measured and managed.

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