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Question 203 - SCS-C01 discussion

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Some highly sensitive analytics workloads are to be moved to Amazon EC2 hosts. Threat modeling has found that a risk exists where a subnet could be maliciously or accidentally exposed to the internet. Which of the following mitigations should be recommended?

A.
Use AWS Config to detect whether an Internet Gateway is added and use an AWS Lambda function to provide auto-remediation.
Answers
A.
Use AWS Config to detect whether an Internet Gateway is added and use an AWS Lambda function to provide auto-remediation.
B.
Within the Amazon VPC configuration, mark the VPC as private and disable Elastic IP addresses.
Answers
B.
Within the Amazon VPC configuration, mark the VPC as private and disable Elastic IP addresses.
C.
Use IPv6 addressing exclusively on the EC2 hosts, as this prevents the hosts from being accessed from the internet.
Answers
C.
Use IPv6 addressing exclusively on the EC2 hosts, as this prevents the hosts from being accessed from the internet.
D.
Move the workload to a Dedicated Host, as this provides additional network security controls and monitoring.
Answers
D.
Move the workload to a Dedicated Host, as this provides additional network security controls and monitoring.
Suggested answer: A

Explanation:

By default, Private instance has a private IP address, but no public IP address. These instances can communicate with each other, but can't access the Internet. You can enable Internet access for an instance launched into a nondefault subnet by attaching an Internet gateway to its VPC (if its VPC is not a default VPC) and associating an Elastic IP address with the instance. Alternatively, to allow an instance in your VPC to initiate outbound connections to the Internet but prevent unsolicited inbound connections from the Internet, you can use a network address translation (NAT) instance. NAT maps multiple private IP addresses to a single public IP address. A NAT instance has an Elastic IP address and is connected to the Internet through an Internet gateway.You can connect an instance in a private subnet to the Internet through the NAT instance, which routes traffic from the instance to the Internet gateway, and routes any responses to the instance.

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asked 16/09/2024
Spandana Gangavaram
32 questions
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