ExpertMedium1 markMultiple Choice
AWS SAA-C03 · Question 63 · Domain 4.4: Network Cost Optimization
A company has a fleet of Amazon EC2 instances in a private subnet that process large amounts of data and upload the results to an Amazon S3 bucket. The instances use a NAT Gateway to access S3. The company has noticed high data transfer costs associated with the NAT Gateway. How can a solutions architect eliminate these NAT Gateway data transfer costs?
A company has a fleet of Amazon EC2 instances in a private subnet that process large amounts of data and upload the results to an Amazon S3 bucket. The instances use a NAT Gateway to access S3. The company has noticed high data transfer costs associated with the NAT Gateway. How can a solutions architect eliminate these NAT Gateway data transfer costs?
Answer options:
A.
Move the EC2 instances to a public subnet and assign Elastic IPs.
B.
Create a VPC Gateway Endpoint for Amazon S3 and update the route table.
C.
Replace the NAT Gateway with a NAT Instance.
D.
Enable S3 Transfer Acceleration on the bucket.
How to approach this question
To avoid NAT Gateway charges for S3 or DynamoDB, always use a VPC Gateway Endpoint.
Full Answer
B.Create a VPC Gateway Endpoint for Amazon S3 and update the route table.✓ Correct
Create a VPC Gateway Endpoint for Amazon S3 and update the route table.
NAT Gateways charge per GB of data processed. If instances in a private subnet transfer large amounts of data to S3 via a NAT Gateway, costs will be high. By creating a VPC Gateway Endpoint for S3, traffic is routed directly to S3 over the AWS private network. Gateway Endpoints for S3 are free of charge.
Common mistakes
Thinking NAT instances are the modern solution to NAT Gateway costs. Gateway Endpoints are the correct architectural pattern.
Practice the full AWS SAA-C03 Practice Exam 1
65 questions · hints · full answers · grading
More questions from this exam
Q01A company has multiple AWS accounts in an AWS Organizations organization. The security team wants...MediumQ02A solutions architect is designing an application that will run on Amazon EC2 instances. The appl...EasyQ03A company wants to implement a federated identity solution for its employees to access the AWS Ma...MediumQ04A mobile application needs to access Amazon DynamoDB directly to read user-specific data. The app...HardQ05A company is hosting a web application on Amazon EC2 instances. The application connects to an Am...Medium