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Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 365 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional SAP-C02
Question #: 365
Topic #: 1
[All AWS Certified Solutions Architect - Professional SAP-C02 Questions]

A company is running a workload that consists of thousands of Amazon EC2 instances. The workload is running in a VPC that contains several public subnets and private subnets. The public subnets have a route for 0.0.0.0/0 to an existing internet gateway. The private subnets have a route for 0.0.0.0/0 to an existing NAT gateway.

A solutions architect needs to migrate the entire fleet of EC2 instances to use IPv6. The EC2 instances that are in private subnets must not be accessible from the public internet.

What should the solutions architect do to meet these requirements?

  • A. Update the existing VPC, and associate a custom IPv6 CIDR block with the VPC and all subnets. Update all the VPC route tables, and add a route for ::/0 to the internet gateway.
  • B. Update the existing VPC, and associate an Amazon-provided IPv6 CIDR block with the VPC and all subnets. Update the VPC route tables for all private subnets, and add a route for ::/0 to the NAT gateway.
  • C. Update the existing VPC, and associate an Amazon-provided IPv6 CIDR block with the VPC and all subnets. Create an egress-only internet gateway. Update the VPC route tables for all private subnets, and add a route for ::/0 to the egress-only internet gateway.
  • D. Update the existing VPC, and associate a custom IPV6 CIDR block with the VPC and all subnets. Create a new NAT gateway, and enable IPV6 support. Update the VPC route tables for all private subnets, and add a route for ::/0 to the IPv6-enabled NAT gateway.
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Suggested Answer: C 🗳️
by cypkir at Nov. 22, 2023, 7:42 a.m.
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George88
Highly Voted 1 year, 2 months ago
Answer: C https://repost.aws/knowledge-center/configure-private-ipv6-subnet
upvoted 12 times
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cypkir
Highly Voted 1 year, 2 months ago
Selected Answer: C
Answer: C
upvoted 6 times
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AzureDP900
Most Recent 3 months ago
C is correct
upvoted 1 times
AzureDP900
3 months ago
Associating an Amazon-provided IPv6 CIDR block with the VPC and all subnets ensures that the EC2 instances in the VPC can use IPv6 without requiring additional configuration. Creating an egress-only internet gateway allows traffic from the public internet to exit the VPC, but prevents incoming traffic (ingress) from reaching the VPC. This meets the requirement that EC2 instances in private subnets must not be accessible from the public internet. Updating the VPC route tables for all private subnets and adding a route for ::/0 to the egress-only internet gateway ensures that traffic destined for IPv6 addresses outside the VPC can exit through the egress-only internet gateway.
upvoted 1 times
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career360guru
1 year, 1 month ago
Selected Answer: C
Option C
upvoted 1 times
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yuliaqwerty
1 year, 1 month ago
C https://docs.aws.amazon.com/vpc/latest/userguide/vpc-migrate-ipv6.html
upvoted 3 times
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GaryQian
1 year, 2 months ago
Selected Answer: C
IPV6 can only be used by Engress only gateway
upvoted 6 times
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ayadmawla
1 year, 2 months ago
Selected Answer: C
IP6 --> Egress GW
upvoted 3 times
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J0n102
1 year, 2 months ago
Selected Answer: C
Answer: C
upvoted 1 times
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shaaam80
1 year, 2 months ago
Selected Answer: C
Answer C. No NAT gateway for IPv6 subnets. Only Egress-only Internet gateway to allow only outbound traffic from private subnets.
upvoted 6 times
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devalenzuela86
1 year, 2 months ago
Selected Answer: B
Answer: B Explanation: * Updating the existing VPC and associating an Amazon-provided IPv6 CIDR block with the VPC and all subnets will enable the EC2 instances to use IPv6 * Updating the VPC route tables for all private subnets and adding a route for ::/0 to the NAT gateway will ensure that the EC2 instances that are in private subnets are not accessible from the public internet
upvoted 2 times
Jahangeer_17
1 year, 1 month ago
NAT gateway does not support IPv6. You should use egress-only internet gateway in-place of NAT gateway for IPv6. https://repost.aws/knowledge-center/configure-private-ipv6-subnet
upvoted 2 times
vibzr2023
1 year, 1 month ago
My Answer is C because of ease and cost effective... NAT gateway do support IPv6 indirectly which is NAT64 and DNS64 provide a workaround for IPv6-to-IPv4 communication https://docs.aws.amazon.com/vpc/latest/userguide/nat-gateway-nat64-dns64.html
upvoted 1 times
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igor12ghsj577
1 year, 1 month ago
Be careful ! This guy gives wrong answers on purpose...
upvoted 3 times
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