Topic 1 Question 40
A company is hosting an image-processing service on AWS in a VPC. The VPC extends across two Availability Zones. Each Availability Zone contains one public subnet and one private subnet.
The service runs on Amazon EC2 instances in the private subnets. An Application Load Balancer in the public subnets is in front of the service. The service needs to communicate with the internet and does so through two NAT gateways. The service uses Amazon S3 for image storage. The EC2 instances retrieve approximately 1 ТВ of data from an S3 bucket each day.
The company has promoted the service as highly secure. A solutions architect must reduce cloud expenditures as much as possible without compromising the service’s security posture or increasing the time spent on ongoing operations.
Which solution will meet these requirements?
Replace the NAT gateways with NAT instances. In the VPC route table, create a route from the private subnets to the NAT instances.
Move the EC2 instances to the public subnets. Remove the NAT gateways.
Set up an S3 gateway VPC endpoint in the VPAttach an endpoint policy to the endpoint to allow the required actions on the S3 bucket.
Attach an Amazon Elastic File System (Amazon EFS) volume to the EC2 instances. Host the images on the EFS volume.
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コメント(6)
- 正解だと思う選択肢: C
C. Setting up an S3 gateway VPC endpoint in the VPC and attaching an endpoint policy to the endpoint will allow the EC2 instances to securely access the S3 bucket for image storage without the need for NAT gateways, reducing costs without compromising security or increasing ongoing operations. This option reduces the costs associated with the NAT gateways and allows for faster data retrieval from the S3 bucket as traffic does not have to go through the internet gateway.
👍 8masetromain2023/01/13 The only reason for C is - Gateway endpoints are not Billed and so cost effective (https://docs.aws.amazon.com/AmazonS3/latest/userguide/privatelink-interface-endpoints.html#types-of-vpc-endpoints-for-s3) If the question changes from single region to across region, the answer would be B (overhead of NAT gateways and traversing TBs of data across NAT is expensive) because gateway endpoints are region specific
👍 5God_Is_Love2023/02/24- 正解だと思う選択肢: C
C for sure
👍 3zozza20232023/01/30
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