Exam AWS Certified Machine Learning - Specialty topic 1 question 43 discussion

NAT gateway COULD GO OUT TO THE INTERNET AND DOWNLOAD BACK MALICIOUS D. IS NOT A GOOD ANSWER. THE SAFE ONE IS ANSWER C. ASSOCIATE WITH VPC_ENDPOINT AND S3_ENDPOINT

C is correct We must use the VPC endpoint (either Gateway Endpoint or Interface Endpoint)to comply with this requirement "Data communication traffic must stay within the AWS network". https://docs.aws.amazon.com/sagemaker/latest/dg/notebook-interface-endpoint.html

A. NO - We don't place a S3 bucket in a VPC, it is always in AWS Service Account B. NO - without an S3 VPC endpoint, traffic will go through the Internet C. YES - we need endpoints for both SageMaker and S3 to avoid Internet traffic D. NO - we need endpoints for both SageMaker and S3 to avoid Internet traffic

Option C

C is the correct. A is not so correct, because it's possible to communicate two different VPCs inside AWS network (which is not optimized).

This configuration would meet the company's requirements for security, as the notebook instance would be placed within a private subnet in a VPC, and data communication traffic would stay within the AWS network through the use of VPC endpoints for S3 and Amazon SageMaker. Additionally, the VPC would not have internet access, further reducing the security risk.

C - "and data communication traffic must stay within the AWS network." that discards D

Answer should be C. Because, Security team don't want Internet Access, Option-D has NAT and will get to Internet somehow. Also connecting S3 and SageMaker EC2 instance via VPC endpoints is best way to secure the resources.

Using a NAT gateway is the old way to do it. Option C is the way to do it now. https://cloudacademy.com/blog/vpc-endpoint-for-amazon-s3/#:~:text=Accessing%20S3%20the%20old%20way%20%28without%20VPC%20Endpoint%29,has%20no%20access%20to%20any%20outside%20public%20resources

"and data communication traffic must stay within the AWS network" , NAT gateway will always go over the Internet to access S3.with NAT you can put your instances in private subnet and NAT itself in public subnet , but still in order to access S3 it will go over the internet. SO answer cannot be D. -- C is the only correct option here , as S3 VPC endpoints is a real thing "google it" and it sole purpose is to create route from VPC endpoint to S3 , without going over the Internet.

C is correct answer. D is only applicable -"If your model needs access to an AWS service that doesn't support interface VPC endpoints or to a resource outside of AWS, create a NAT gateway and configure your security groups to allow outbound connections. " https://docs.aws.amazon.com/sagemaker/latest/dg/host-vpc.html

D is correct

Answer is D, read third paragraph https://docs.aws.amazon.com/sagemaker/latest/dg/appendix-notebook-and-internet-access.html

NAT is the way that a VPC connect to internet and other ASW service when there is NO INTERNET ACCESS FOR VPC. Thus the answer is D.

"concerned that internet-enabled notebook instances create a security vulnerability where malicious code running on the instances could compromise data privacy." NAT Gateway does not mitigate this risk!

C: If you configure your VPC so that it doesn't have internet access, models that use that VPC do not have access to resources outside your VPC. If your model needs access to resources outside your VPC, provide access with one of the following options: If your model needs access to an AWS service that supports interface VPC endpoints, create an endpoint to connect to that service. For a list of services that support interface endpoints, see VPC Endpoints in the Amazon VPC User Guide. For information about creating an interface VPC endpoint, see Interface VPC Endpoints (AWS PrivateLink) in the Amazon VPC User Guide. If your model needs access to an AWS service that doesn't support interface VPC endpoints or to a resource outside of AWS, create a NAT gateway and configure your security groups to allow outbound connections. For information about setting up a NAT gateway for your VPC, see Scenario 2: VPC with Public and Private Subnets (NAT) in the Amazon Virtual Private Cloud User Guide.

what is the difference between A & C? are both answers OK?