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What is Cloud Computing?
- Cloud Computing refers to the ability to access various computing resources, such as applications, servers, data storage, and networking capabilities, over the internet. These resources are hosted at a remote data center managed by a cloud services provider. Users can access these resources on-demand and pay for them either through a monthly subscription fee or based on their usage.
CLOUD COMPUTING HELPS YOU TO DO THE FOLLOWING:
Lower IT costs:
Cloud lets you offload some or most of the costs and effort of purchasing, installing, configuring, and managing your own on-premises infrastructure.
Scale more easily and cost-effectively:
Cloud provides elasticity—instead of purchasing excess capacity that sits unused during slow periods, you can scale capacity up and down in response to spikes and dips in traffic. You can also take advantage of your cloud provider’s global network to spread your applications closer to users around the world.
Improve agility and time-to-value:
With cloud, your organization can start using enterprise applications in minutes, instead of waiting weeks or months for IT to respond to a request, purchase and configure supporting hardware, and install software. Cloud also lets you empower certain users—specifically developers and data scientists—to help themselves to software and support infrastructure.
The term ‘cloud computing’ also refers to the technology that makes cloud work. This includes some form of virtualized IT infrastructure—servers, operating system software, networking, and other infrastructure that’s abstracted, using special software, so that it can be pooled and divided irrespective of physical hardware boundaries. For example, a single hardware server can be divided into multiple virtual servers.
Cloud computing services
SaaS (Software-as-a-Service)
Also known as cloud-based software or cloud applications—is application software that’s hosted in the cloud, and that users access via a web browser, a dedicated desktop client, or an API that integrates with a desktop or mobile operating system. In most cases, SaaS users pay a monthly or annual subscription fee; some may offer ‘pay-as-you-go’ pricing based on your actual usage.
PaaS (Platform-as-a-Service)
Provides software developers with on-demand platform—hardware, complete software stack, infrastructure, and even development tools—for running, developing, and managing applications without the cost, complexity, and inflexibility of maintaining that platform on-premises.
IaaS (Infrastructure-as-a-Service)
Provides on-demand access to fundamental computing resources—physical and virtual servers, networking, and storage—over the internet on a pay-as-you-go basis. IaaS enables end users to scale and shrink resources on an as-needed basis, reducing the need for high, up-front capital expenditures or unnecessary on-premises or ‘owned’ infrastructure and for overbuying resources to accommodate periodic spikes in usage.
Types of cloud computing
Public Cloud is a type of cloud computing in which a cloud service provider makes computing resources—anything from SaaS applications, to individual virtual machines (VMs), to bare metal computing hardware, to complete enterprise-grade infrastructures and development platforms—available to users over the public internet. These resources might be accessible for free, or access might be sold according to subscription-based or pay-per-usage pricing models.
Private cloud is a cloud environment in which all cloud infrastructure and computing resources are dedicated to, and accessible by, one customer only. Private cloud combines many of the benefits of cloud computing—including elasticity, scalability, and ease of service delivery—with the access control, security, and resource customization of on-premises infrastructure.
Hybrid cloud is just what it sounds like—a combination of public and private cloud environments. Specifically, and ideally, a hybrid cloud connects an organization's private cloud services and public clouds into a single, flexible infrastructure for running the organization’s applications and workloads.
Multicloud and hybrid multicloud is the use of two or more clouds from two or more different cloud providers. Having a multicloud environment can be as simple using email SaaS from one vendor and image editing SaaS from another. But when enterprises talk about multicloud, they're typically talking about using multiple cloud services—including SaaS, PaaS, and IaaS services—from two or more of the leading public cloud providers.
Cloud security
Traditionally, security concerns have been the primary obstacle for organizations considering cloud services, particularly public cloud services. In response to demand, however, the security offered by cloud service providers is steadily outstripping on-premises security solutions.
Maintaining cloud security demands different procedures and employee skillsets than in legacy IT environments. Some cloud security best practices include the following:
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Shared responsibility for security:
Typically, the cloud provider is responsible for securing the cloud infrastructure, while the customer is responsible for safeguarding its data within the cloud. It is also crucial to clearly define data ownership between private and public third parties.
Data encryption:
Data should be encrypted while at rest, in transit, and in use. Customers must maintain full control over security keys and hardware security module.
User identity and access management:
Both the customer and IT teams need to have a complete understanding of and visibility into network, device, application, and data access.
Collaborative management:
Effective communication and clear, understandable processes between IT, operations, and security teams will ensure smooth and secure cloud integrations that are sustainable.
Security and compliance monitoring:
This begins with understanding all regulatory compliance standards applicable to your industry and setting up active monitoring of all connected systems and cloud-based services to maintain visibility of all data exchanges between public, private, and hybrid cloud environments.
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