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Question 249 - SAP-C01 discussion

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An EC2 instance that performs source/destination checks by default is launched in a private VPC subnet. All security, NACL, and routing definitions are configured as expected. A custom NAT instance is launched. Which of the following must be done for the custom NAT instance to work?

A.
The source/destination checks should be disabled on the NAT instance.
Answers
A.
The source/destination checks should be disabled on the NAT instance.
B.
The NAT instance should be launched in public subnet.
Answers
B.
The NAT instance should be launched in public subnet.
C.
The NAT instance should be configured with a public IP address.
Answers
C.
The NAT instance should be configured with a public IP address.
D.
The NAT instance should be configured with an elastic IP address.
Answers
D.
The NAT instance should be configured with an elastic IP address.
Suggested answer: A

Explanation:

Each EC2 instance performs source/destination checks by default. This means that the instance must be the source or destination of any traffic it sends or receives. However, a NAT instance must be able to send and receive traffic when the source or destination is not itself. Therefore, you must disable source/destination checks on the NAT instance.

Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_NAT_Instance.html#EIP_DisableSrcDestCheck

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asked 16/09/2024
Lietuvis Kau
32 questions
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