understanding the aws environment

Question 1

what are aws regions?

Answer 1

cloud magic using hundreds of thousands of servers maintained within physical data centers located in a widely distributed set of geographic regions

Question 2

how are regionally based services distributed?

Answer 2

a sever in ONE aws region

Question 3

what are the benefits of aws regions? Hint: there are three

Answer 3

Locate your infrastructure geographically closer to your users to allow access with the lowest possible latency

Locate your infrastructure within national borders to meet regulatory compliance with legal and banking rules

Isolate groups of resources from each other and from larger networks to allow the greatest possible security

Question 4

even if services are available regionally, are they only regional?

Answer 4

no, aws presents their services as global

Question 5

what are example(s) of globally based services?

Answer 5

AWS IAM
Amazon CloudFront
Amazon S3

Question 6

what are service endpoints?

Answer 6

a reference used to connect to resources for specific region and service

Question 7

what is an aws availability zone?

Answer 7

one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region.

Question 8

what is an advantage of separation with az’s?

Answer 8

if one AZ loses power or suffers some kind of catastrophic outage, the chances of it spreading to a second AZ in the region are minimal.

Question 9

what are subnets?

Answer 9

network segments; when you want to organize resources you work with in a region; a block IP address

Question 10

what is a single point of failure?

Answer 10

when a resource runs without backup

Question 11

what is the benefits of redundancy when responding to failure? Hint: there are two

Answer 11

immediate backup

geographically parallel resources

Question 12

how does aws use auto-scaling when it comes to application failure?

Answer 12

it is configured to replace or replicate a resource to ensure that a predefined service level is maintained regardless of changes in user demand or the availability of existing resources.

Question 13

how does aws use load balancing when it comes to application failure?

Answer 13

orchestrating the use of multiple parallel resources to direct user requests to the server resource that’s best able to provide a successful experience

Question 14

what is a common case for using load balancing?

Answer 14

coordinating the use of primary and (remote) backup resources to cover for a failure

Question 15

what is an edge location?

Answer 15

a site where AWS deploys physical server infrastructure to provide low latency user access to Amazon-based data.

Question 16

what is the best-known tenant of edge locations? Hint: it is a service

Answer 16

Amazon CloudFront

Question 17

what are some more example of aws service that make use of edge locations?

Answer 17

Amazon Route 53
AWS Shield
Lambda@Edge

Question 18

what are the solutions regional edge cache locations provide?

Answer 18

Objects rejected by edge locations can be moved to the regional edge caches.

won’t have to go back to the origin.

Capable of handling less popular content

Question 19

what is the aws shared responsibility model?

Answer 19

a helpful articulation of those rules and assumptions, and it’s worth spending some time thinking about it

Question 20

what is the cx responsible for? Hint: there are four responsibilities

Answer 20

cx data
user apps, access management
os, network, and access management
data encryption

Question 21

what is aws responsible for? Hint: the are 3 responsibilites

Answer 21

hardware and network maintenance
aws global infrastructure
managed services

Question 22

what is the purpose of managed cloud services?

Answer 22

“hiding” all or some of the underlying configuration and administration work needed to keep things running, leaving you free to focus on the “business” end of your project

Question 23

what is the purpose of keeping some resources unmanaged?

Answer 23

Some cloud operations will demand greater involvement from you and your administration team, and some will demand less. Use this simple rule of thumb: if you can edit it, you own it.

Question 24

how does the service health status provide help?

Answer 24

As part of its end of the bargain, AWS makes regularly updated, region-by-region reports on the status of its services publicly available. Any service outages that could affect the performance of anyone’s workload will appear on Amazon’s Service Health Dashboard

Question 25

according to the aws acceptable use policy, aws does not permit the use of its infrastructure in ___

Answer 25

any illegal, harmful, or offensive way