Cloud Computing Foundations

Question 1

What is cloud computing

Answer 1

The delivery of computing services over the internet

Question 2

6 advantages of cloud computing

Answer 2

1) Go global in minutes 2) Stop spending money running & maintaining Data Centers 3) Benefit from massive economies of scale 4) Increase speed & agility 5) Stop guessing capacity 6) Trade capital expense for variable expense

Question 3

Go global in minutes

Answer 3

You can deploy your applications around the world at the click of a button

Question 4

Stop spending money running & maintaining data centers

Answer 4

You can focus on building your applications instead of managing hardware

Question 5

Benefit from massive economies of scale

Answer 5

Volume discounts are passed on to you, which provides lower pay-as-you-go prices.

Question 6

Increase speed and agility

Answer 6

The provided services allow you to innovate more quickly and deliver applications faster

Question 7

Stop guessing capacity

Answer 7

Your capacity is matched exactly to your demand

Question 8

Trade capital expense for variable expense

Answer 8

You pay for what you use instead of making huge upfront investments

Question 9

Benefits of cloud computing

Answer 9

1) High Availability 2) Elasticity 3) Agility 4) Durability

Question 10

High Availability

Answer 10

Highly available systems are designed to operate continuously without failure for a long time. These systems avoid loss of service by reducing or managing failures.

Question 11

Elasticity

Answer 11

With elasticity you don’t have to plan ahead of time how much capacity you need. You can provision only what you need, and the grow or shrink based on demand.

Question 12

Agility

Answer 12

The cloud gives you increased agility. All the services you have access to help you innovate faster, giving you speed to market.

Question 13

Durability

Answer 13

Durability is all about long term data protection. This means your data will remain intact without corruption.

Question 14

Cloud Computing Models

Answer 14

IaaS PaaS SaaS

Question 15

IaaS

Answer 15

Building Blocks. Fundamental building blocks that can be rented. Web Hosting. Monthly subscription to have a hosting company serve your website.

Question 16

SaaS

Answer 16

Complete application. Using a complete application, on demand, that someone offers to users Email provider. Your personal email that you access through a web browser is a SaaS

Question 17

PaaS

Answer 17

Used by developers. Develop SW using web based tools without worrying about the underlying infrastructure. Storefront website. Tools provided to build a storefront application that runs on another computer server.

Question 18

Cloud Deployment Models

Answer 18

Private Public Hybrid

Question 19

Private Cloud

Answer 19

Also called “ on premises “ Exist in your internal data center Doesn’t offer the advantages of cloud computing

Question 20

Public Cloud

Answer 20

Offered by AWS You aren’t responsible for the physical hardware Provides all the advantages of cloud computing

Question 21

Hybrid

Answer 21

Sample architecture for a hybrid solution Highly sensitive data store locally Web app runs on AWS infrastructure AWS provides tools so they talk to each other

Question 22

Hybrid Cloud diagram, how is it connected

Answer 22

Direct Connect

Question 23

Regions

Answer 23

It’s a physical location

AWS logically groups its regions in geographic locations

Characteristics

Fully Independent and isolated. If one region is impacted the other won’t be.

Resource and service specific. Regions are isolated and resources aren’t automatically replicated across them

Question 24

Availability Zones

Answer 24

Availability zones AZ, consist of one or more physically separated data centers, each with redudant power, networking and connectivity, housed in separate facilities

Question 25

Availability Zones Characteristics

Question 26

Edge Locations

Answer 26

Cache conten for fast delivery to your users

Reduce latency

Latency.- Time between a user request and the reponse

Question 27

Review Time

Answer 27

1. Region is a collection of AZs
2. You should setup resources in Regions closest to your users
3. Most resources are tied up to a specific region

Question 28

Review Edge Location

Answer 28

1. Content Delivery Network CDN & Amazon Cloud Front
2. Reduced Latency
3. Is like a mini data center, but it doesn’t run your main infrastructure like EC2 instances

Question 29

Review Availability Zones

Answer 29

An AZ contains the servers you’re renting and it’s where you deploy. Your applications.

An AZ is associated to a single Region

Question 30

AWS Management Console

Answer 30

Allow you to access your AWS account and manage applications running in your account from a web browser

Question 31

Root User

Answer 31

Created automatically when registering for AWS account

Unrestricted access to the account, cannot be restricted

Protect with MFA multi factor authentication

Question 32

AWS Command Line Interface CLI

Answer 32

Access AWS account through terminal or command window

Sometimes new funtionality are available first on CLI before the console

Question 33

Programmatic Access

Answer 33

Provides access to your AWS resources through an application or a tool like CLI

1. CLI
2. Application Code: AWS services can be accessed from an application code using SDKs and programmatic calls
3. Software Development Kits SDKs. Access from popular programming languages like Java, Python, C#