What Is Public Cloud? Things You Need to Know 

Public cloud

Public Cloud Computing (PCC) is a model of computing in which the services are provided by third-party providers over the Internet. The term “cloud” refers to the fact that these services can be accessed from anywhere at any time, and they are usually billed on an as-needed basis. In this way, PCC allows organizations to pay only for what they use rather than buying large upfront investments in infrastructure. 

Cloud computing has become increasingly popular due to its ability to reduce capital expenditure, improve agility, and lower total cost of ownership. It also provides elasticity, scalability, mobility, and flexibility. However, there are some concerns about security, privacy, data protection, and control. 

The main advantages of using cloud computing include: 

Cost savings—By outsourcing IT resources such as servers, storage, networking equipment, and software applications, companies can save money because they no longer need to purchase or maintain those assets. This may result in significant annual cost savings. For example, Amazon Web Services (AWS), Ace Public Cloud, Google Apps, Microsoft Azure, and Rackspace Hosting all offer cloud solutions that provide access to server capacity, network bandwidth, databases, email, and other essential web-based services. 

Agility—Companies can quickly scale up their operations when demand increases without having to invest in additional hardware. They can also easily scale down their operations when demand decreases without incurring extra costs. 

Scalability—Because cloud computing offers virtualized resources, it can support a much larger number of users than traditional systems. As a result, companies can increase the number of users accessing their applications while maintaining performance levels. 

Mobility—Users can access cloud-based applications through mobile devices, tablets, laptops, and desktops. This means that employees can work from almost anywhere. 

Flexibility—With cloud computing, businesses can choose to deploy new applications whenever needed instead of purchasing fixed assets. This helps them avoid obsolescence issues associated with legacy technology. 

However, there are some disadvantages of using cloud computing including: 

Security—Security breaches can occur if sensitive information is stored in the cloud. Also, the cloud provider must ensure that the data remains private. 

Privacy—Data stored in the cloud is accessible to anyone who has access to the cloud service. Therefore, users should take steps to protect personal information. 

Control—In order to prevent unauthorized access to data, users must trust the cloud service provider. If the cloud service provider loses user data, it could have serious consequences for the company. 

Data sovereignty—If a country’s laws do not allow certain types of data to be transferred outside its borders, then the cloud service provider cannot transfer data out of that country. 

Reliability—There is always a possibility that the cloud service will fail. If the cloud service fails, the company’s business processes will stop working until the problem is resolved. 

Cloud computing has been used by many organizations worldwide. According to Gartner Inc., more than 100 million people use cloud computing today. The top three reasons cited for adoption were improved efficiency, reduced time to market, and increased productivity. 

Types of clouds 

Public clouds 

A public cloud is one where customers pay only for what they use, rather than buying upfront infrastructure. Public clouds are typically hosted on a large scale by a third party. Examples include Amazon EC2, Ace Public Cloud, Google App Engine, Windows Azure, and OpenStack. 

Private clouds 

A private cloud is an internal deployment of cloud computing resources within an organization. Private clouds are often based on existing enterprise IT infrastructures. These clouds are usually managed internally by the organization itself. An advantage of this approach is that it allows the organization to control the security and privacy of its own data. However, this may require significant investment in terms of time and money. 

Hybrid clouds 

A hybrid cloud combines both public and private clouds. It provides the benefits of both models. For example, a customer might rent space on a public cloud platform such as AWS or Microsoft Azure. At the same time, the customer might also run some workloads on-premises using dedicated servers. 

Public cloud security 

The public cloud model offers several advantages over traditional approaches to deploying computer systems. One of these advantages is the ability to quickly provision additional capacity when demand exceeds expectations. Another advantage is the ability to dynamically allocate resources to meet fluctuating demands. A disadvantage is that the public cloud model does not provide any inherent security mechanisms. As a result, companies need to implement their own security measures. 

Cloud Firewall Security concerns have historically been the number one obstacle for organizations considering public clouds. However, according to recent research, the security offered by public cloud service providers is steadily outpacing on-premises security capabilities. 

With the growing popularity of containerized applications, and new public cloud offerings that offer vendor-certified compliance to industry standards and regulations, the ability to maintain a security posture at least as strong as that achievable with on-premises infrastructure is becoming easier than ever. 

McAfee predicts that by 2020, IaaS cloud workloads will experience fewer security incidents than those running in traditional data centers. Gartner projects that by the same year, there will be 60% less cybersecurity incidents in the cloud than on premises. 

Nonetheless, maintaining such security standards requires different governance procedures and skill sets than in legacy IT environments, where many employees are familiar with physical servers, network devices, operating systems, and traditional tools like antivirus and anti-malware. 

In addition to the challenges posed by managing security risks in a public cloud environment, organizations must also consider how to address regulatory requirements, including PCI DSS, HIPAA, GLBA, and others. In fact, some of the most commonly cited reasons for moving off-premise are related to compliance issues.