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Tech > Cloud Computing > Flashcards

Cloud Computing Flashcards

1
Q

What is NIST definition of cloud computing

A

A model for enabling ubiquitous, convenient, on demand network access to a shared pool of configurable computing resources

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2
Q

In simple terms what is cloud computing

A

Where software applications, data storage and processing power and accessed over the internet

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3
Q

What do IDC and Gardner state about cloud computing?

A

Spending will exceed 500 billion

Effect 1 trillion in IT spending

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4
Q

How much is on the cloud

A

Somewhere between 20-25 percent

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5
Q

What are the 3 platforms of computing (IDC)

A

Mainframes and dumb terminals
Pcs and network
Cloud computing

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6
Q

What are the benefits and characteristics of cloud computing?

A 
Dramatically scale able 
No fixed cost
Collaborative
Device independent 
Task centric- focus on what people want
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7
Q

What is SaaS?

A

Software as a service- take it or leave it form of cloud computing as users run what cloud supplier has to offer. Google docs, Microsoft office online zoho and sales force

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8
Q

What are the benefits and drawbacks of SaaS?

A 
Accessible from any device
Collaborative
No fc 
Continually updated
Less sophisticated
Dependant on the internet
Not what people are used to
Applications run in the cloud
Limited to vendor applications
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9
Q

Pass and iaas both offer platform and infrastructure what are these?

A

Platform- software environments used to create, run and deploy end user applications
Infrastructure- the physical hardware on which applications and platforms operate

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10
Q

What is PaaS?

A

Platform as a service
Users create and run saas applications using the tools and languages of the provider
Can rapidly bring cheap SaaS applications to market
Provided online with infrastructure and platform

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11
Q

What are the benefits of PaaS?

A

Very fast
Build things on the same technology that deploys them
Rapid development
Debugging and implementation are far easier

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12
Q

What are the drawbacks of PaaS?

A

Flexibility power trade off- build applications but only in the way the vendor allows you to do so
Limited to what you can achieve
Things will work but perhaps not as expected
Vendor lock in
Very large sunk cost

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13
Q

What is infrastructure as a service?

A

Vendor offers computer hardware in the cloud on which their customers can store data and develop and run whatever applications they please
Allows companies to move existing programmes online and remove data centre

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14
Q

What is virtualisation

A

After the internet itself virtualisation is the most fundamental technology that allows cloud computing to occur
It allows physical servers to be split into virtual servers and each can be used by an independent user

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15
Q

What is private cloud

A

Rent part of a data centre
Most risk adverse
Costly
Secure

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16
Q

What Is dedicated hosting

A 
Rent servers on demand 
Lose some level of exclusivity
Others may take control now and then
Dynamic scalability
Costs significantly less
17
Q

What is hybrid hosting

A

Mix of virtual and real servers
Gives flexibility
Application may be on physical but data on virtual
May use for peaks of demand

18
Q

What is cloud hosting

A 
Sell only virtual servers
Gives maximum cloud benefit
May be seen as too risky
Most technologically advanced
AWS dominates service
19
Q

What are ec2 advantages

A

Elastic
Reliable
Flexible
Inexpensive

20
Q

What do garner and IDC argue

A

Cloud computing is inevitable because
It’s becoming essential to remain competitive
Becoming essential to be green
Becoming essential for next gen applications

21
Q

IDC (2015)

A

72% of organisations have at least one application in the cloud
67% of organisations have security concerns

22
Q

How much is the SaaS market meant to be worth today

A

47 billion

23
Q

Occado use g suite

A

Helps with employee collaboration everywhere

Used app engine to build a where’s my order app

24
Q

What percentage of internet users live in the top 20 countries

A

75%

25
Q

How did easyJet use azure

A

Built a new seat booking system to

26
Q

How are airbnb using cloud computing

A

Uses 200 amazon elastic comput cloud instances

Flexibility and responsiveness is helping them to achieve more growth

27
Q

How did Lamborghini use aws

A

Updated from their old infrastructure and found it caused a 250% boost in visitors
Reduced to cost of their marketing infrastructure by 50% while achieving better performance and scalability

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