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Question 546 - SCS-C01 discussion

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A company has two VPCs in the same AWS Region and in the same AWS account Each VPC uses a CIDR block that does not overlap with the CIDR block of the other VPC One VPC contains AWS Lambda functions that run inside a subnet that accesses the internet through a NAT gateway. The Lambda functions require access to a publicly accessible Amazon Aurora MySQL database that is running in the other VPC

A security engineer determines that the Aurora database uses a security group rule that allows connections from the NAT gateway IP address that the Lambda functions use. The company's security policy states that no database should be publicly accessible.

What is the MOST secure way that the security engineer can provide the Lambda functions with access to the Aurora database?

A.
Move the Aurora database into a private subnet that has no internet access routes in the database's current VPC Configure the Lambda functions to use the Aurora database's new private IP address to access the database Configure the Aurora databases security group to allow access from the private IP addresses of the Lambda functions
Answers
A.
Move the Aurora database into a private subnet that has no internet access routes in the database's current VPC Configure the Lambda functions to use the Aurora database's new private IP address to access the database Configure the Aurora databases security group to allow access from the private IP addresses of the Lambda functions
B.
Establish a VPC endpoint between the two VPCs in the Aurora database's VPC configure a service VPC endpoint for Amazon RDS In the Lambda functions' VPC. configure an interface VPC endpoint that uses the service endpoint in the Aurora database's VPC Configure the service endpoint to allow connections from the Lambda functions.
Answers
B.
Establish a VPC endpoint between the two VPCs in the Aurora database's VPC configure a service VPC endpoint for Amazon RDS In the Lambda functions' VPC. configure an interface VPC endpoint that uses the service endpoint in the Aurora database's VPC Configure the service endpoint to allow connections from the Lambda functions.
C.
Establish an AWS Direct Connect interface between the VPCs Configure the Lambda functions to use a new route table that accesses the Aurora database through the Direct Connect interface Configure the Aurora database's security group to allow access from the Direct Connect interface IP address
Answers
C.
Establish an AWS Direct Connect interface between the VPCs Configure the Lambda functions to use a new route table that accesses the Aurora database through the Direct Connect interface Configure the Aurora database's security group to allow access from the Direct Connect interface IP address
D.
Move the Lambda functions into a public subnet in their VPC Move the Aurora database into a private subnet in its VPC Configure the Lambda functions to use the Aurora database's new private IP address to access the database Configure the Aurora database to allow access from the public IP addresses of the Lambda functions
Answers
D.
Move the Lambda functions into a public subnet in their VPC Move the Aurora database into a private subnet in its VPC Configure the Lambda functions to use the Aurora database's new private IP address to access the database Configure the Aurora database to allow access from the public IP addresses of the Lambda functions
Suggested answer: B

Explanation:

This option involves creating a VPC Endpoint between the two VPCs that allows private communication between them without going through the internet or exposing any public IP addresses. In this option, a VPC endpoint for Amazon RDS will be established, and an interface VPC endpoint will be created that points to the service endpoint in the Aurora database's VPC. This way, the Lambda functions can use the private IP address of the Aurora database to access it through the VPC endpoint without exposing any public IP addresses or allowing public internet access to the database.

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asked 16/09/2024
Hossein Nasri
31 questions
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