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Exam AWS Certified SysOps Administrator - Associate topic 1 question 172 discussion

Exam question from Amazon's AWS Certified SysOps Administrator - Associate
Question #: 172
Topic #: 1
[All AWS Certified SysOps Administrator - Associate Questions]

A SysOps administrator creates a new VPC that includes a public subnet and a private subnet. The SysOps administrator successfully launches 11 Amazon EC2 instances in the private subnet. The SysOps administrator attempts to launch one more EC2 instance in the same subnet. However, the SysOps administrator receives an error message that states that not enough free IP addresses are available.

What must the SysOps administrator do to deploy more EC2 instances?

  • A. Edit the private subnet to change the CIDR block to /27.
  • B. Edit the private subnet to extend across a second Availability Zone.
  • C. Assign additional Elastic IP addresses to the private subnet.
  • D. Create a new private subnet to hold the required EC2 instances.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by Liongeek at Nov. 16, 2022, 10:18 p.m.
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Christina666
Highly Voted 1 year, 3 months ago
Selected Answer: D
It's not possible to change or modify the IP address range of an existing virtual private cloud (VPC) or subnet. However, you can do one of the following: Add an additional IPv4 CIDR block as a secondary CIDR to your VPC. Create a new VPC with your preferred CIDR block and then migrate the resources from your old VPC to the new VPC (if applicable).
upvoted 12 times
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Liongeek
Highly Voted 1 year, 11 months ago
Ans: D Ref: https://aws.amazon.com/es/premiumsupport/knowledge-center/vpc-ip-address-range/
upvoted 7 times
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Nomzie
Most Recent 8 months, 3 weeks ago
Selected Answer: D
It's not possible to change or modify the IP address range of an existing virtual private cloud (VPC) or subnet. However, you can do one of the following: Add an additional IPv4 CIDR block as a secondary CIDR to your VPC. Create a new VPC with your preferred CIDR block and then migrate the resources from your old VPC to the new VPC (if applicable). Source: https://repost.aws/es/knowledge-center/vpc-ip-address-range
upvoted 2 times
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r2c3po
10 months ago
Selected Answer: A
A is the correct choice: A. Edit the private subnet to change the CIDR block to /27: By increasing the CIDR block size to /27 or a larger range, you allocate more IP addresses to the subnet, allowing for the deployment of additional EC2 instances. Options B, C, and D are not appropriate solutions for addressing the issue: B. Editing the private subnet to extend across a second Availability Zone does not directly resolve the lack of available IP addresses in the existing subnet. C. Assigning additional Elastic IP addresses to the private subnet is not a solution for expanding the available private IP addresses within the subnet. Elastic IP addresses are public IP addresses associated with instances. D. Creating a new private subnet is a valid option, but it involves additional steps such as moving resources, updating security groups, and reconfiguring routing. Editing the existing subnet's CIDR block is a more straightforward solution.
upvoted 1 times
Grodgar
4 months, 1 week ago
Wrong, CIDR block can't be edited
upvoted 1 times
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fig
11 months, 2 weeks ago
Selected Answer: D
You cannot change the CIDR block once created. So not A. Answer is D
upvoted 4 times
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johnnyjin
1 year, 1 month ago
Selected Answer: A
Should be A, from /28(16) to /27(32) then the subnet will have more IP address available
upvoted 2 times
fig
11 months, 2 weeks ago
You cannot change the CIDR block once created. So not A. Answer is D
upvoted 2 times
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goatbernard
1 year, 10 months ago
Selected Answer: D
D is the answer
upvoted 3 times
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