Session 1-2 Flashcards
Cloud Computing
Way to rent compute power and storage from someone else’s data center; Delivery of Computing Services (ie virtual machines, AI, storage) over the internet
What is an example of agility
Scalibility, elasticity, global reach
What is the shared responsibility model
With the shared responsibility model responsibilities get shared between the cloud provider and the consumer. Physical security, power, cooling, and network connectivity are the responsibility of the cloud provider. The consumer isn’t collocated with the datacenter, so it wouldn’t make sense for the consumer to have any of those responsibilities.
At the same time, the consumer is responsible for the data and information stored in the cloud. (You wouldn’t want the cloud provider to be able to read your information.) The consumer is also responsible for access security, meaning you only give access to those who need it.
(look at diagram)
4 types of cloud models
- private cloud
- public cloud
- hybrid cloud
- multi cloud
private cloud
It’s a cloud (delivering IT services over the internet) that’s used by a single entity – complete control over resources and security; data is not collocated w other org data
Private cloud provides much greater control for the company and its IT department.
However, it also comes with greater cost and fewer of the benefits of a public cloud deployment.
Can be hosted from your on site datacenter, or a dedicated datacenter offsite, or a third party that has dedicated that datacenter to your company.
Orgs are responsible for purchasing hardware for set up, maintenance, and updates
Public Cloud
A public cloud is built, controlled, and maintained by a third-party cloud provider. With a public cloud, anyone that wants to purchase cloud services can access and use resources. The general public availability is a key difference between public and private clouds.
Applications can be quickly providioned and deprovisioned (set up and taken down)
orgs only pay for what they use
orgs dont have complete control over resources and security
Hybrid Cloud
A hybrid cloud is a computing environment that uses both public and private clouds in an inter-connected environment. A hybrid cloud environment can be used to allow a private cloud to surge for increased, temporary demand by deploying public cloud resources. Hybrid cloud can be used to provide an extra layer of security. For example, users can flexibly choose which services to keep in public cloud and which to deploy to their private cloud infrastructure.
Orgs determine where to run their apps
Orgs control security, compliance, or legal requirements
Multi-cloud
In a multi-cloud scenario, you use multiple public cloud providers. Maybe you use different features from different cloud providers. Or maybe you started your cloud journey with one provider and are in the process of migrating to a different provider. Regardless, in a multi-cloud environment you deal with two (or more) public cloud providers and manage resources and security in both environments.
When comparing IT infrastructure models what are the 2 types of expenses to consider? Define both
Capital expenditure: typically a one-time, up-front expenditure to purchase or secure tangible resources. A new building, repaving the parking lot, building a datacenter, or buying a company vehicle are examples of CapEx.
operational expenditure: OpEx is spending money on services or products over time. Renting a convention center, leasing a company vehicle, or signing up for cloud services are all examples of OpEx.
What type of expense does cloud computing fall under?
Cloud computing falls under OpEx because cloud computing operates on a consumption-based model. With cloud computing, you don’t pay for the physical infrastructure, the electricity, the security, or anything else associated with maintaining a datacenter. Instead, you pay for the IT resources you use. If you don’t use any IT resources this month, you don’t pay for any IT resources.
What is cloud computing?
delivery of computing services over the internet
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 model
According to the shared responsibility model, which cloud service type places the most responsibility on the customer?
Iaas (infrastructure as a service)
IaaS places the most responsibility on the consumer, with the cloud provider being responsible for the basics of physical security, power, and connectivity.
According to the shared responsibility model, which cloud service type places the least responsibility on the customer?
software as a service Saas
In the IaaS model, what is the cloud provider responsible for? what is the consumer responsible for?
the cloud provider is responsible for maintaining the hardware, network connectivity (to the internet), and physical security. You’re responsible for everything else: operating system installation, configuration, and maintenance; network configuration; database and storage configuration; and so on. With IaaS, you’re essentially renting the hardware in a cloud datacenter, but what you do with that hardware is up to you.
