Module 3: AWS Storage services

Question 1

What is EBS?

Answer 1

Is a storage service that store blocks. and can be attached to an EC2 isntance.

Question 2

How can we encrypt our EBS volume?

Answer 2

To encrypt a EBS volume we first need to do a snapshopt of our current EBS volumen, then encrypt that snapshot and use it as our new EBS volume.

Question 3

How can we create an AMI from our EBS volume?

Answer 3

Creating an snapshot of our EC2 instances.

Question 4

EBS volume is a regional service?

Answer 4

Nope, EBS is an availability zone service so in order to use it with your EC2 instances you need to be sure that both of them are on the same availability zone.

Question 5

What is amazon S3?

Answer 5

Is a service that store objetcs in Buckets

Question 6

What is a Bucket in S3?

Answer 6

Is like a container to store objects, here you can save images, documents, and in general static files. At the moment we create the bucket we can select an unique name for it and the region where it is going to work.

Question 7

What is an Object?

Answer 7

Object are stored in buckets and the key difference is that and object is a file that can’t be separate in small pieces to edit. Every object is unique and it has a unique key in the buckets it resides on, in general that key is the name of the file or the object.

Question 8

How we can access to an object on a S3 Bucket?

Answer 8

S3 uses URL endpoint to access to and object. for example: https://DOC-EXAMPLE-BUCKET.s3.us-west-2.amazonaws.com/photos/puppy.jpg -> in this case the name of the bucket is “DOC-EXAMPLE-BUCKET”, the region is “us-west-2” and the name of the object you are trying to access is “/puppy.jpg “.

Question 9

What is level of Availability of S3?

Answer 9

Is 99.9999% it is because replicate your S3 objects are replicated in at least 3 availability zones in the region.

Question 10

How we can select an S3 type of service?

Answer 10

• Frequent access to that objects.
• Infrequently access objects.
• A mix between both

Question 11

What is Amazon s3 standar?

Answer 11

Is a type of S3 service that is used for frequently access objects.

Question 12

What is Amazon S3 Standar IA and Onezone IA?

Answer 12

is a type of S3 service that is used for infrequently access objects, in the case of Onezone your objects only are saved in one Availability zone an it has 99.5% of availability.

Question 13

What is Amazon Glacier and Amazon Deep Glacier?

Answer 13

Is an S3 service used for store files for a very long time. or archived files. The difference here is that it costs less but you have to wait certain amount of time in order to retrieve your data.

Question 14

What is S3 intelligent Tiering?

Answer 14

Is like a storgae class that move an object from one tier of frequently access like S3 standar to another with infrequently access like S3 standar IA. You define the time frame to execute that action.

Question 15

What are bucket polices?

Answer 15

Are used to grant access to a Bucket for users

Question 16

What is encryption at rest in S3?

Answer 16

Is when you encrypt an object before storing them in S3.

Question 17

What is server side Encryotion?

Answer 17

In this Amazon manage the keys to encrypt your objects. When amazon store your object S3 only stores your encrypted object. When you retrieve that object amazon desencrypt that object.

Question 18

Whta is Client side Encryption in S3?

Answer 18

You manage the keys to decrypt your objects, and also you have to encrypt your object when uploading it in S3.

Question 19

What is AWS storage Gateway?

Answer 19

Is a service that helps you to connect your on premises server with Amazon storage.

Question 20

What is a stored volume?

Answer 20

Is a S3 backed storage where you Amazon Storage Gateway store data on your on premise center, but S3 does a back up as a EBS snapshot.

Question 21

What is a cached volume?

Answer 21

Here the Amazon Storage Gateway store most of your Data on S3 but some of that data is cached locally on you on premise servers.

Question 22

Where EBS snapshots are stored?

Answer 22

On S3.