Domain 1: Design Resilient Architectures

Question 1

Decoupling

Answer 1

different pieces of the design being able to function autonomously from other pieces

Question 2

CDN, Content Delivery Networking

Answer 2

moving content very close to the end user

Question 3

User Data

Answer 3

often used as a text or file, the script that you want executed when the EC2 instance launches

Question 4

Default Security Group

Answer 4

Allows all traffic and protocols through all port ranges

Question 5

Key Pair

Answer 5

used to access an instance

Question 6

Elastic Interface

Answer 6

allows you or AWS to attach dynamically a GPU, the gpu power will increase or decrease depending on its need, autoscaling

Question 7

Decoupling Advantages

Answer 7

• Failure of a component can be survived
• Modify Components as needed
• Launch or terminate as needed
• Reduce impact on users of our changes

Question 8

Synchronous Decoupling

Answer 8

• Components must always be available for the solution to function
• Ex. load balancing between EC2 instances in different AZs

Question 9

Asynchronous Decoupling

Answer 9

• Loose

- Component can go offline, and the messaging can be queued

Question 10

SQS Queue Types

Answer 10

• Standard

- FIFO

Question 11

Standard Queue Type

Answer 11

• Messaging ordering isnt preserved
• Atleast once delivery
• Very fast
• Unlimited transactions per second per API action

Question 12

FIFO Queue Type

Answer 12

• Messaging ordering is preserved
• Exactly once processing
• No duplication

Question 13

SNS

Answer 13

Pushes out notifications for activities, alerts, thresholds, large sums, etc.

Question 14

System-to-system messaging

Answer 14

a managed messaging service that lets you decouple publishers from subscribers. This is useful for system-to-system messaging for micro services, distributed architectures, and server less applications

Question 15

SNS- User Notifications

Answer 15

lets you send push notifications to mobile apps, text messages to mobile phone numbers, and plain text emails to email addresses. You can fan out messages with a topic, or publish to mobile endpoints directly

Question 16

API Gateway

Answer 16

Application Programming Interface, Sits between a collection of backend services,

• Creates API’s
• Publishes API’s
• Maintaining API’s
• Monitoring API’s
• Securing API’s

Question 17

API Gateway Types

Answer 17

• HTTP API
• WebSocket API
• REST API
• REST API private

Question 18

HTTP API

Answer 18

• Build low latency and cost effective REST API’s with built in features such as OIDC and OAuth2, and native CORS support.
• Works with: Lambda, HTTP backends

Question 19

WebSocket API

Answer 19

• Uses persistent connections for real-time use cases such as chat applications or dashboards.
• Works with: Lambda, HTTP, AWS Services

Question 20

REST API

Answer 20

• REST API where you gain complete control over the request and response along with API management capabilities
• Works with: Lambda, HTTP, AWS Services

Question 21

REST API private

Answer 21

• Rest API that is only accessible from within a VPC

- Works with: Lambda, HTTP, AWS Services

Question 22

Classic Load Balancer

Answer 22

Not used often,Used when you have an existing application running in the EC2-Classic network

Question 23

Application Load Balancer

Answer 23

focuses on web app requests and Http/https traffic, operates on request level

Question 24

Network Load Balancer

Answer 24

• Ultra-high performance
• TLS offloading at scale
• Centralized certificate deployment
• Support for UDP and Static IP addresses for your application
• Connection level

TLS Offloading- a proxy server that acts as an intermediary point between client and server applications, and is used to terminate and/or establish TLS (or DTLS) tunnels by decrypting and/or encrypting communications.

Question 25

Gateway Load Balancer

Answer 25

Used when you need to deploy and manage a fleet of third-party virtual appliances that support GENEVE. These appliances enable you to improve security, compliance, and policy controls.

Question 26

Load Balancing

Answer 26

ELB automatically distributes incoming application traffic and scales resources to meet traffic demands

Question 27

S3, as a Resilient storage

Answer 27

- Simple Storage Service, - object based storage, - can have amazon take the objects that are being stored in a region inside of an S3 bucket and automatically replicate those objects to a different AZ

Question 28

EBS, as a Resilient Storage

Answer 28

- Elastic Block Storage - used underlying an EC2 instance for its boot/ root volume - will be located in an AZ where the EC2 instance that needs it is located - can get a snapshot (copy) at anytime and put it in another AZ

Question 29

EFS, as a Resilient Storage

Answer 29

Elastic File System, - automatically replicates across AZs, - EFS is typically the network file storage for linux systems, - very resilient

Question 30

FSx, as a Resilient Storage

Answer 30

Windows systems, used for windows file server, can choose between a single AZ or resiliently store over several AZ

Question 31

Versioning

Answer 31

S3, is a means of keeping multiple variants of an object in the same bucket. You can use the S3 Versioning feature to preserve, retrieve, and restore every version of every object stored in your buckets.

Question 32

S3 Glacier- Vault

Answer 32

You organize your data in Amazon S3 Glacier using vaults. Checks Inventory once a day and will show updated results then

Question 33

Where do you create a Vault, and Archive in Glacier?

Answer 33

- Vault, created in the management console | - Archive, created in the CLI or code

Question 34

S3 Glacier- Archive

Answer 34

An archive is any object, such as a photo, video, or document, that you store in a vault. This is done through code or CLI

Question 35

CloudFormation

Answer 35

Provides a common language to describe and provision all the infrastructure resources in your environment in a safe, repeatable way

Question 36

CloudFormation Advantages

Answer 36

- Validated, building something using code - Can save templates to use later - Can make copies of architectures for testing - Can use GUI to design architectures and have them scripted

Question 37

CloudFormation Stacks

Answer 37

Collection of AWS resources that you can manage as a single unit. All the resources in a stack are defined by the stack's AWS CloudFormation template

Question 38

CloudFormation Stacksets

Answer 38

StackSets enables you to create, update, or delete stacks across multiple accounts and regions with a single operation