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Zorluk: ZorCost-Effective Network Routing and Data Transfer Optimization

An analytics platform uses a fleet of processing nodes on Amazon EC2 in private subnets across two Availability Zones in `us-west-2` to ingest raw telemetry logs. These nodes need to write approximately 200 TB200\text{ TB} of structured data monthly to an Amazon DynamoDB table in the same Region. They also need to periodically replicate processed summaries (80 TB80\text{ TB} monthly) to an on-premises database via an existing 10 Gbps10\text{ Gbps} AWS Direct Connect connection. Which combination of architectural decisions will achieve the most cost-effective data transfer routing? (Select TWO.)

  1. Configure a Gateway VPC Endpoint for Amazon DynamoDB in the VPC and associate it with the private subnet route tables.Cevap
  2. Associate the Direct Connect Gateway directly with a Virtual Private Gateway (VGW) attached to the VPC, and route the on-premises traffic over a Private Virtual Interface (Private VIF).Cevap
  3. C
    Deploy an Interface VPC Endpoint (AWS PrivateLink) for Amazon DynamoDB and update the applications to use the endpoint's DNS name.
  4. D
    Route all DynamoDB traffic through NAT Gateways deployed in the public subnets of each Availability Zone.
  5. E
    Attach the VPC to an AWS Transit Gateway and route the on-premises replication traffic through a Transit Virtual Interface (Transit VIF) connected to the Transit Gateway.

Cevap

Configure a Gateway VPC Endpoint for Amazon DynamoDB in the VPC and associate it with the private subnet route tables; and associate the Direct Connect Gateway directly with a Virtual Private Gateway (VGW) attached to the VPC, routing the on-premises traffic over a Private Virtual Interface (Private VIF).
The correct architecture uses a Gateway VPC Endpoint for Amazon DynamoDB because it does not charge hourly or data processing fees, unlike NAT Gateways or Interface VPC Endpoints. Furthermore, associating the Direct Connect Gateway directly with the Virtual Private Gateway (VGW) and routing traffic over a Private Virtual Interface (Private VIF) avoids AWS Transit Gateway data processing fees ($0.02 per GB), saving substantial costs for the replication workload.

Adım Adım Çözüm

1
Analyze the data transfer requirements for DynamoDB.
Identify that 200 TB200\text{ TB} of data needs to be written from private EC2 instances to DynamoDB in the same Region.
To determine the most cost-effective path to DynamoDB without routing traffic through a NAT Gateway.
2
Compare Gateway VPC Endpoints and Interface VPC Endpoints for DynamoDB.
Gateway VPC Endpoints are free of charge, whereas NAT Gateways charge 0.045/GB0.045\text{/GB} and Interface Endpoints charge 0.01/GB0.01\text{/GB} plus hourly fees.
To choose the routing mechanism that avoids all processing charges for the 200 TB200\text{ TB} DynamoDB traffic.
3
Analyze the data replication path to the on-premises database via the Direct Connect connection.
Identify that 80 TB80\text{ TB} of data will be transferred out monthly.
To choose between Transit Gateway and a Direct Connect Gateway linked to a Virtual Private Gateway (VGW).
4
Compare Transit Gateway with direct VGW attachment for Direct Connect routing.
Transit Gateway introduces a processing fee of 0.02/GB0.02\text{/GB} (1,600 for 80 TB1,600\text{ for } 80\text{ TB}), while associating the Direct Connect Gateway directly with the VPC's VGW via a Private VIF incurs no processing fees.
To select the configuration that minimizes unnecessary middle-mile data processing charges.

Anahtar Kavram

Selecting the most cost-effective VPC endpoint type (Gateway vs Interface) and routing architecture (VGW with Private VIF vs Transit Gateway with Transit VIF) to minimize AWS network processing charges.
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Cost-Effective Network Routing and Data Transfer Optimization