Cloud Computing

Question 1

Was ist Cloud Computing?

Answer 1

• on-demand delivery of compute power, database storage, applications, and other IT resources
• pay-as-you-go pricing
• provision exactly the right type and size of computing resources
• as many resources as you need, almost instantly
• servers, storage, databases and set of application services simply accessible

Question 2

Deployment Methods

Answer 2

• Private Cloud (Complete Control)
• Public Cloud (owned by third party)
• Hybrid Cloud (on-premises and cloud)

Question 3

5 Characteristics of Cloud

Answer 3

1. On-demand self service
2. Broad network access
3. Multi-tenancy and resource pooling
4. Rapid elasticity and scalability
5. Measured service

Question 4

Six Advantages of Cloud

Answer 4

1. Trade capital expense (CAPEX) for operational expense (OPEX)
2. Benefit from massive economies of scale
3. Stop guessing capacity
4. Increase speed and agility
5. Stop spending money running and maintaining data centers
6. Go global in minutes

Question 5

Problems solved by the Cloud

Answer 5

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

Question 6

Types of Cloud

Answer 6

• Infrastructure as a Service (IaaS)
• Platform as a Service (PaaS)
• Software as a Service (SaaS)

Question 7

Managing types of Cloud

Answer 7

• On-Premises = alles selbst
• IaaS = Hardware (Server, Storage, Networking) und Virtualization von AWS, rest selbst
• PaaS = Infrastruktur und Laufzeitumgebung von AWS, rest selbst (Applications und Data)
• SaaS = alles von AWS

Question 8

Pricing of the Cloud (Grob)

Answer 8

• Compute
• Storage
• Data transfer OUT of the Cloud

Question 9

AWS Global Infrastructure

Answer 9

• Regions
• Availability Zones (AZ)
• Data Centers
• Edge Locations / Points of Presence

Question 10

AWS Regions

Answer 10

• Regions all around the world
• cluster of data centers
• Most AWS services are region-scoped

Question 11

How to choose an AWS Region?

Answer 11

• Compliance with data governance and legal requirements
• Proximity to customers
• Available services within a Region
• Pricing

Question 12

AWS Availability Zones

Answer 12

• Each region has many availability zones
• separate from each other (in case of disaster)

Question 13

AWS Edge Locations (Points of Presence)

Answer 13

• 400+ Edge Locations & 10+ Regional Caches
• Content delivered with lower latency

Question 14

Global-scoped vs Region-scoped

Answer 14

• Global-scoped: IAM, Route 53, CloudFront, WAF
• Region-scoped (most services): EC2, Elastic Beanstalk, Lambda, Rekognition

Question 15

Shared Responsibility Model

Answer 15

• Customer = responsibility for the security in the cloud
• AWS = responsibility for the security of the cloud