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Global Infrastructure Flashcards

Describe the AWS global infrastructure including Regions, Availability Zones, and Edge Locations. (7 cards)

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1
Q

Which statement is true in relation to data stored within an AWS Region?

  1. Data is not replicated outside of a region unless you configure it
  2. Data is always replicated to another region
  3. Data is automatically archived after 90 days
  4. Data is always automatically replicated to at least one other availability zone
A

1. Data is not replicated outside of a region unless you configure it

Data stored within an AWS region is not replicated outside of that region automatically. It is up to customers of AWS to determine whether they want to replicate their data to other regions. You must always consider compliance and network latency when making this decision.

  • Data is always replicated to another region is incorrect. Data is never replicated outside of a region unless you configure it.
  • Data is automatically archived after 90 days is incorrect. Data is never automatically archived. You must configure data to be archived.
  • Data is always automatically replicated to at least one other availability zone is incorrect. Data is not automatically replicated to at least one availability zone – this is specific to each service and you must check how your data is stored and whether the availability and durability is acceptable.

Reference:
AWS Security Best Practices

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2
Q

Which AWS services are delivered globally rather than regionally?

(Select TWO.)

  1. Amazon EC2
  2. Amazon CloudFront
  3. Amazon Route 53
  4. Amazon VPC
  5. Amazon RDS
A

2. Amazon CloudFront
3. Amazon Route 53

Amazon CloudFront is a content delivery network (CDN) service that helps you distribute your static and dynamic content quickly and reliably with high speed globally.
Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service which is also deployed globally.

  • Amazon EC2 is incorrect. You launch EC2 instances within an Availability Zone, not globally.
  • Amazon VPC is incorrect. A VPC is a regional construct which spans all the Availability Zones within a Region.
  • Amazon RDS is incorrect. You also choose to launch RDS instances within an Availability Zone, not globally.

References:

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3
Q

What are the advantages of Availability Zones?

(Select TWO.)

  1. They allow regional disaster recovery
  2. They provide fault isolation
  3. They enable the caching of data for faster delivery to end users
  4. They are connected by low-latency network connections
  5. They enable you to connect your on-premises networks to AWS to form a hybrid cloud
A

2. They provide fault isolation
4. They are connected by low-latency network connections

Each AWS region contains multiple distinct locations called Availability Zones (AZs). Each AZ is engineered to be isolated from failures in other AZs. An AZ is a data center, and in some cases, an AZ consists of multiple data centers.
AZs within a region provide inexpensive, low-latency network connectivity to other zones in the same region. This allows you to replicate your data across data centers in a synchronous manner so that failover can be automated and be transparent for your users.

  • They allow regional disaster recovery is incorrect. An AZ enables fault tolerance and high availability for your applications within a region not across regions.
  • They enable the caching of data for faster delivery to end users is incorrect. CloudFront is the technology that is used to enable caching of data for faster delivery to end users.
  • They enable you to connect your on-premises networks to AWS to form a hybrid cloud is incorrect. Direct Connect is the technology that is used to connect your on-premises network to AWS to form a hybrid cloud.

Reference:
AWS Global Infrastructure

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4
Q

Which of the facts below are accurate in relation to AWS Regions?

(Select TWO.)

  1. Each region consists of 2 or more availability zones
  2. Each region consists of a collection of VPCs
  3. Each region is designed to be completely isolated from the other Amazon Regions
  4. Regions have direct, low-latency, high throughput and redundant network connections between each other
  5. Regions are Content Delivery Network (CDN) endpoints for CloudFront
A

1. Each region consists of 2 or more availability zones
3. Each region is designed to be completely isolated from the other Amazon Regions

Availability Zones (not regions) have direct, low-latency, high throughput and redundant network connections between each other. Each AWS Region consist of 2 or more Availability Zones. AWS Regions are geographical areas and each AWS Region is designed to be completely isolated from other AWS Regions.

  • Each region consists of a collection of VPCs is incorrect. A region is not a collection of VPCs, it is composed of at least 2 AZs. VPCs exist within accounts on a per region basis.
  • Regions have direct, low-latency, high throughput and redundant network connections between each other is incorrect. This is a description of an Availability Zone.
  • Regions are Content Delivery Network (CDN) endpoints for CloudFront is incorrect. Edge locations are (not regions) are Content Delivery Network (CDN) endpoints for CloudFront

References:
AWS Global Infrastructure

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5
Q

What considerations are there when choosing which region to use?

(Select TWO.)

  1. Data sovereignty
  2. Available storage capacity
  3. Latency
  4. Pricing in local currency
  5. Available compute capacity
A

1. Data sovereignty
3. Latency

You may choose a region to reduce latency, minimize costs, or address regulatory requirements.
Latency is the delay caused mostly by distance. This means you should choose to create your buckets in Regions that are closer (physically) to your users.
Some countries or industries have regulations that mandate data must not leave a jurisdiction or country border. In this case you simply select an AWS Region accordingly.

  • Available storage capacity is incorrect. Available capacity is generally not a concern as AWS has a large pool of resources and does not disclose the available capacity in each region.
  • Pricing in local currency is incorrect. Pricing for AWS services is in USD
  • Available compute capacity is incorrect. Available capacity is generally not a concern as AWS has a large pool of resources and does not disclose the available capacity in each region.

Reference:
Choose an AWS Region for your Amazon EMR cluster

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6
Q

The AWS global infrastructure is composed of?

(Select TWO.)

  1. Regions
  2. Clusters
  3. Fault Zones
  4. Availability Zones
  5. IP subnets
A

1. Regions
4. Availability Zones

The AWS Global infrastructure is built around Regions and Availability Zones (AZs). A Region is a physical location in the world where AWS have multiple AZs. AZs consist of one or more discrete data centers, each with redundant power, networking, and connectivity, housed in separate facilities

  • Clusters is incorrect as this is not part of the AWS global infrastructure.
  • Fault Zones is incorrect as this is not part of the AWS global infrastructure.
  • IP subnets is incorrect as this is not part of the AWS global infrastructure.

References:
AWS Global Infrastructure

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7
Q

What is an availability zone composed of?

  1. One or more regions
  2. One or more data centers in a location
  3. A collection of edge locations
  4. A collection of VPCs
A

2. One or more data centers in a location

Availability zones are composed of one or more data centers in a location. Availability Zones are physically separate and isolated from each other. AZ’s have direct, low-latency, high throughput and redundant network connections between each other

  • One or more regions is incorrect. A region is a geographical area. Each region consists of 2 or more availability zones
  • A collection of edge locations is incorrect. Edge locations are used by the CloudFront network, they are not related to AZs.
  • A collection of VPCs is incorrect. AZs exist within a VPC.

References:
AWS Global Infrastructure

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