Cloud Concepts Flashcards
Cloud computing
Cloud computing is a combination of software, data access, computation, and storage services provided to clients through the internet. It is used to describe the internet infrastructure in computer network diagrams.
Public cloud
Anyone can access a public cloud. Cloud-based computing resources (such as platforms, applications, and storage) are made available to the public by a cloud service provider. The service provider may require a fee for using these resources.
Private cloud
A private cloud provides resources to a single organization. Access is granted only to users within the organization. Private clouds are typically hosted internally, but an organization may use third-party hosting because of the necessary expense and expertise.
Hybrid cloud
A hybrid cloud is a combination of public and private clouds that are leveraged for certain kinds of apps.
Infrastructure as a Service (IaaS)
Delivers infrastructure to the client, such as processing, storage, networks, and virtualized environments. The customer rents the infrastructure components that they need.
With IaaS, the provider is responsible for managing the following aspects of the infrastructure:
Computing power
Storage
Networking
The customer is responsible for managing:
Operating systems
Applications
Data
Access
Azure virtual machines and Azure Storage are examples of IaaS.
Platform as a Service (PaaS)
The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers. PaaS is often used for development, analytics, and business intelligence.
With Paas, the provider is responsible for managing the following aspects of the platform:
Operating systems
Computing power
Storage
Networking
The customer is responsible for managing:
Data
Access
Applications
Azure App Services and Azure SQL Database are examples of PaaS.
Software as a Service (SaaS)
SaaS delivers software applications to the client over the internet or on a local area network. It is by far the most used model.
With software as a service, the provider is responsible for managing the following aspects of the software applications:
Operating system
Networking
Storage
Computing power
Applications
Microsoft Outlook, Calendar, Teams, OneDrive, and Office 365 are examples of SaaS.
Backup
The cloud provides reliable backup solutions. That means you won’t lose data when a local storage device fails.
Accessibility
The cloud gives you access to your data on any device and from any location. All you need is the right application and an internet connection.
Collaboration
Cloud-based applications give you the ability to share documents and collaborate with other people to create and edit documents.
Resource pooling
Many businesses want to expand their computing resources without purchasing and maintaining additional in-house hardware or hiring and training new staff. For these companies, low-cost cloud hosting solutions are a great option.
Elasticity
Most cloud services are pay-as-you-go, meaning that an organization only pays for what they use.
Privacy and security concerns
Data files stored on the cloud are susceptible to hackers, who gain access to cloud storage devices or capture data as it travels over the internet between the local device and the cloud. Most cloud service providers use encryption for this reason.
Internet connection issues
While storing data on the cloud is beneficial when you need access from multiple devices, it’s a problem when the internet connection goes down. Without a local copy of files, your productivity may be dependent on the quality of your internet connection.
Cloud hosting outages
Even if the internet is up and running, you may be unable to access the files when the cloud service is down. Google, Amazon, Microsoft, and other cloud hosting businesses work hard to avoid downtime, but there will always be short periods of hardware or software failure. For this reason, you should keep an offline copy of any critically important files or applications.
