A Cantrill - AWS Fundamentals

Question 1

What is created in a default VPC?
And what is the standard CIDR?

Answer 1

172.31.0.0/16 is the default CIDR. (One Region)
-One /20 subnet per AZ
-IGW, SG, and NACL

Question 2

True or False: Its best practice to use the default VPC

Answer 2

False.
Its best practice NOT to use default VPC.

Question 3

What are you charged for when an EC2 is “stopped”?

Answer 3

storage. Usually in the form of EBS

Question 4

What does an AMI contain?

Answer 4

AMI Permissions (public or private), Boot Volume, Block Device Mapping and Data Volumes.

Question 5

T or F: S3 bucket names are globally unique (any and all buckets in AWS)

Answer 5

True

Question 6

What is the number of S3 buckets allowed in an account?

Answer 6

100 default, 1000 using an AWS account request

Question 7

How many objects are allowed in an S3 bucket?
What is the size of any object?

Answer 7

Unlimited number of objects in a bucket.
Each object can be between 0 - 5TB.

Question 8

What is the default access level for an S3 bucket upon creation?

Answer 8

Block all public access

Question 9

CFN templates use which languages?

Answer 9

YAML or JSON

Question 10

What is High Availability ? HA

Answer 10

a system designed to be available as OFTEN as possible. Think SLAs of 3 9’s or 5 9’s

-Minimizes any outages, maximize uptime

Question 11

What it (FT) Fault Tolerance?

Answer 11

the property that enables a system to CONTINUE OPERATING PROPERLY in the event of the FAILURE OF SOME of its COMPONENTS

-Ability to operate through failure
-Costs much more, more complex

Question 11

What is Disaster Recovery (DR)?

Answer 11

A set of policies, tools and procedures to ENABLE THE RECOVERY or CONTINUATION of VITAL technology infrastructure and systems FOLLOWING A NATURAL OR HUMAN-INDUCED DISASTER

-Plan used when HA & FT don’t work

Question 12

What are Zone files called in Route 53?

Answer 12

Hosted Zone

Question 13

What happens when you create a new hosted zone in Route 53?

Answer 13

AWS allocates 4 different name servers to host this

Question 14

What is true of an AWS Public Service?

Answer 14

-Anyone can connect but permissions are required to access the service
-Its located in the AWS “Public” Zone

Question 15

What is true of an AWS Private Service?

Answer 15

-Located in a VPC and is accessible from same VPC
-Accessible from other VPCs or On-prem as long as private networking is configured

Question 16

What is a CloudFormation Logical Resource?
CF Physical resource?

Answer 16

-A resource defined in a CFT
-A physical resource created by creating a CF stack

Question 17

How many DNS root servers exist?
Who manages the DNS Root Servers?
Who manages the DNS Root Zone?

Answer 17

-13 Root servers
-Root servers are managed by 12 Large organizations
-IANA manages the DNS Root Zone

Question 18

Which type of organisation maintains the zones for a TLD (e.g .ORG)?

Answer 18

Registry

Question 19

Which type of organisation has relationships with the .org TLD zone manager allowing domain registration?

Answer 19

Registrar