Cloud concepts
What is a public cloud?
A service provider makes resources available to the general public over the Internet. Public cloud services may be free or offered on a pay-per-usage model.
What is Infrastructure as a Service (IaaS)?
Build pay-as-you-go IT infrastructure by renting servers, virtual machines, storage, networks, and operating systems from a cloud provider.
According to the shared responsibility model, which cloud service type places the most responsibility on the customer?
Infrastructure as a Service (IaaS)
PaaS
Focus on application development.
What are some could benefits?
Higher availability, Elastisity, scalability, reliability, etc.
What is Platform as a Service (PaaS)?
Provides environment for building, testing, and deploying software applications; without focusing on managing underlying infrastructure
Operational Expenditure (OpEx)
Spend on products and services as needed, pay-as-you-go Get billed immediately
laaS
The most flexible cloud service
Capital Expenditure (CapEx)
The up-front spending of money on physical infrastructure. Costs from CapEx have a value that reduces over time.
SaaS
Users pay for the software they use on a subscription model.
What is a private cloud?
a cloud that is owned and operated by an organization for its own benefit. provide security
What is the Consumption-based model
end users only pay for the resources that they use. Whatever they use is what they pay for
What is cloud computing?
Cloud computing is the delivery of computing resources over the internet, enabling faster innovation, flexible resources, and economies of scale.
Which cloud model uses some datacenters focused on providing cloud services to anyone that wants them, and some data centers that are focused on a single customer?
Hybrid cloud
What is a Hybrid Cloud?
Hybrid clouds combine features of public and private clouds but can expose host computers to users outside your organization.
What is Software as a Service (SaaS)?
Users connect to and use cloud-based apps over the internet: for example, Microsoft Office 365, email, and calendars.
