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AWS Review > AWS-Tech Concepts > Flashcards

AWS-Tech Concepts Flashcards

1
Q

What is an AWS Availability Zone?

A

1 or more An Availability Zones may exist within a region.
1 or more discreet data centres
Redundant power, networking and connectivity

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2
Q

What is Cloud Computing?

A

Refers to the on-demand delivery of IT resources and applications via the internet with pay as you go pricing.

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3
Q

What is Cloud Formation

A

Cloud Formation enabled the templated envrionments.

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4
Q

What are characteristics of Elasticity ?

A
  • scale resources up or down easily.
  • quick deployment
  • instantly scale up
  • instantly shut down resources that are no longer required.
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5
Q

What are characteristics of Fault Tolerance?

A
  • Built-in redundancy of components to ensure uptime.
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6
Q

What are characteristics of High Availability?

A
  • Minimised downtime.
  • systems always functioning and accessible.
  • No human intervention required.
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7
Q

What is an AWS Region?

A

A physical location in the world, it can contain 1 or more availability zones.

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8
Q

What is CloudFront?

A

This is Amazon’s CDN and is deployed in highly populated areas, also called Edge Locations.

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9
Q

What are Edge Locations?

A

Edge locations are highly populated areas where Amazon deploys it’s CDN - Cloud front and DNS service.

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10
Q

What services are run at the edge locations?

A

Amazon Route 53
Cloudfront
AWS WAF
AWS Shield

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11
Q

What are reserved instances?

A

Purchased instances with a 1-3 year term at a significant discount.

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12
Q

What are Scheduled Instances?

A

Purchased instances that are always available on the specified recurring schedule. 1 year term only.

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13
Q

What are spot instances?

A

Bid on unused instances, i.e unused technology in an amazon data centre. Your instance runs as long as possible provided it is above the spot price.

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14
Q

What are dedicate instances?

A

paid by the hour ? single tenant hardware.

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15
Q

What are dedicated hosts?

A

pay for a physical host, single tenant.

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16
Q

What is a VPC?

A

a virtual private network. You can define VPNs, private subnets, configure gateways.
Each subnet must reside entirely within 1 availability
zone.

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17
Q

VPN options?

A

1) Hardware VPN (IPSec)
2) AWS Direct Connect (purchase a direct connection 1-10Gb personal connection)
3) AWS VPN Cloudhub (dedicated private (up to 10 routers))
4) Software VPN (VPN that terminates on an EC2 instance)

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18
Q

What is AWS Artifact?

A

It allows the end user to download compliance and audit reports for your auditor. (PCI, FFIEC, ISO, GDPR, SOC1,2,3 etc etc)
(AWS > Services > Artifact)

19
Q

What is Cloud trail?

A

1) It is on by default.
2) It logs API calls
3) It can log to an S3 bucket

20
Q

Amazon DBs

A 
RDS
Amazon DynamoDB
Amazon elasticache
Amazon RedShift
AWS DB Migration service
21
Q

What is RDS?

A 
Cost-efficient and resizable
manages time consuming DBs
Fast to deploy
isolated DB environment in the cloud
Example: MySql, PostgreSQL, MS SQL, MariaDB, Oracle, Amazon Aurora.
22
Q

What is Amazon DynamoDB?

A

Similar to MongoDB / Cassandra NoSQL.
No limit on storage
fully managed.
need to spec the Read and Write throughput.

23
Q

What is cloud watch?

A

A big dispersed metrics gathering service, can you cannot opt our.
CPU utilisation, I/O, Network throughput.
You can create alarms based on statistics.
alarms can send notifications and perform functions.

24
Q

What is an Elastic Load Balancer?

A

A network or application layer load balancer that allows you to spread network or application load.

25
Q

What is the VPC?

A

Amazon Virtual Private Cloud.

1) Allow you to created virtual networks in the AWS cloud.
2) Allows complete control network configuration
3) Offers several layers of security controls
4) Other AWS services deploy into VPC.
5) Lives in a specific region
6) Can span multiple Availability Zones

26
Q

What is a VPC subnet?

A

It is used to separate and divide multiple Amazon VPCs.
It allows amazon VPCs to span multiple Availability Zones. (AZ)
You can create as many as you want.
Fewer is recommended.

27
Q

What are VPC route tables?

A

They control traffic going out of a subnet.

28
Q

What is the role of an IGW?

A

Allows access to the internet from the VPC.

29
Q

What is the role of the NACL?

A

It controls access to subnets. (stateless)

30
Q

what is a public subnet?

A

A VPC subnet can communicate directly with the internet. *requires a IGW)

31
Q

what is a private subnet?

A

A VPC subnet that cannot communicate directly with the internet.

32
Q

What is the AWS Security Group?

A

It is built into AWS.
It is essentially a virtual firewall.
controls accessibility
basically, it filters traffic to your instances

33
Q

What is VTL?

A

Virtual Tape Library (VTL) is a type of storage gateway available to AWS users.

34
Q

What is SSE?

A

Server Side Encryption (SSE)

  • Amazon S3 Managed keys (SSE-S3)
  • KMS (SSE-KMS) (provides audit logs)
  • Customer-Provided Keys (SSE-C)
35
Q

What is RRS?

A

Reduced Redundancy Storage

36
Q

What is the availability on RRS?

A

99.99%

37
Q

What is the durability of RSS?

A

99.99%

38
Q

What is the durability of S3?

A

99.999999999%

39
Q

What is the availability on S3?

A

99.99%

40
Q

What is the minimum files size on S3?

A

1 Byte

41
Q

What is an RI?

A

This is an Amazon EC2 Reserved Instance, there are 3 types.

42
Q

What is EFS?

A

Elastic File system

43
Q

What is SQS?

A

It is web service that you access to a message queue, that can be used to store messages.

44
Q

What is OLAP?

A

Online Analytics Processing

AWS Review (80 decks)

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