Cloud Computing

Question 1

What are the 3 model types of cloud computing?

Answer 1

• Infrastructure as a service (IaaS)
  ▪︎ managed up to the OS
  - provides networking, computers, data storage space
  - provide building blocks
  - highest level of flexibility
• Platform as a service (PaaS)
  ▪︎ managed up to the code
  - removes the need for your org to manage the underlying infrastructure
  - focus on deployment and management of your apps
• Software as a service (SaaS)
  ▪︎ consumption model
  - completed product run and managed by the service provider

Question 2

What are the 4 types of cloud deployment? (Deployment Models)

Answer 2

• Public Cloud (Cloud)
• Hybrid Cloud (mix of public and private)
• Private Cloud (on-premise, managed within own data center)
• Multicloud (private/public clouds from multiple providers)

Question 3

What is pricing based on?

Answer 3

• Compute (CPU/RAM and duration)
• Storage (quantity of data stored)
• Outbound data(networking) (data leaving an AWS region, data IN is free)

Question 4

What is the AWS Global Infrastructure made up of?

Answer 4

• AWS Regions
• Availability Zones
• Local Zones
• Edge Locations and Regional Edge Caches

Question 5

What are AWS Regions?

Answer 5

• A geographical area
• Each region consists of 2 or more availability zones
• A region is isolated from other AWS regions

Question 6

What are Availability Zones?

Answer 6

• Availability Zones are physically separate and isolated from each other
• Span one or more data centers
• Designed as an independent failure zone

Question 7

What are Local Zones?

Answer 7

• Extensions of AWS Regions where you can run your latency sensitive applications
• Place compute, storage, database and other AWS services closer to end users

Question 8

What are Edge Locations and Regional Edge Caches?

Answer 8

• Edge Locations are Content Delivery Network endpoints for CloudFront
• There are more edge locations than regions
• Regional Edge Caches sit between the CloudFront Origin servers and the Edge Locations
• A Regional Edge Cache has a larger cache-width than each of the individual Edge Locations

Question 9

What is the AWS shared responsibility model?

Answer 9

• AWS is responsible for security “of” the Cloud
  
  • AWS is responsible for protecting the infrastructure that runs all of the services offered in the AWS Cloud (including hardware, software, networking, and facilities that run AWS Cloud services.
• Customers are responsible for security “in” the Cloud
  
  • For EC2 this includes network level security, operating system patches and updates, IAM user access management, and client and server-side data encryption

Question 10

What are the advantages of the cloud?

Answer 10

6 Advantages:
- Trade capital expense for variable expense (operational expense)
- Benefit from massive economies of scale
- Stop guessing about capacity
- Increase speed and agility
- Stop spending money running and maintaining data centers
- Go global in minutes

Question 11

What is cloud computing?

Answer 11

The on-demand delivery of compute power, database storage, applications and other IT resources

Question 12

What are the 5 characteristics of Cloud Computing?

Answer 12

• On-demand self service - users can provision resources and use them without human interaction from the service provider
• Broad network access - resources available over the network and can be accessed by diverse client platforms
• Multi-tenancy and resource pooling - multiple customers can share the same infrastructure and applications with security and privacy. Multiple customers serviced from the same physical resources
• Rapid elasticity and scalability - Automatically and quickly acquire and dispose resources. Scale based on demand
• Measured service - usage is measured, users pay correctly for what they have used

Question 13

What problems are solved by the cloud?

Answer 13

• Flexibility
• Cost-Effectiveness
• Scalability
• Elasticity
• High-availability and fault-tolerance
• Agility