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Exam AWS-SysOps topic 1 question 244 discussion

Exam question from Amazon's AWS-SysOps
Question #: 244
Topic #: 1
[All AWS-SysOps Questions]

A user has created a VPC with CIDR 20.0.0.0/24. The user has used all the IPs of CIDR and wants to increase the size of the VPC. The user has two subnets: public (20.0.0.0/28) and private (20.0.1.0/28). How can the user change the size of the VPC?

  • A. The user can delete all the instances of the subnet. Change the size of the subnets to 20.0.0.0/32 and 20.0.1.0/32, respectively. Then the user can increase the size of the VPC using CLI
  • B. It is not possible to change the size of the VPC once it has been created
  • C. The user can add a subnet with a higher range so that it will automatically increase the size of the VPC
  • D. The user can delete the subnets first and then modify the size of the VPC
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
Once the user has created a VPC, he cannot change the CIDR of that VPC. The user has to terminate all the instances, delete the subnets and then delete the
VPC. Create a new VPC with a higher size and launch instances with the newly created VPC and subnets.
by tetural at Dec. 24, 2019, 1:59 p.m.
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dexdinh91
4 months, 4 weeks ago
Selected Answer: B
https://repost.aws/knowledge-center/vpc-ip-address-range
upvoted 1 times
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albert_kuo
10 months, 4 weeks ago
Selected Answer: C
By adding a subnet with a higher range, the user effectively increases the size of the VPC, allowing for more IP addresses to be allocated to resources within the VPC.
upvoted 1 times
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Adeshina
2 years, 2 months ago
Answer is B as You cannot increase or decrease the size of an existing CIDR block.
upvoted 1 times
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sunilpanda
2 years, 6 months ago
Now possible - C https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Subnets.html#vpc-resize
upvoted 1 times
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MrDEVOPS
2 years, 6 months ago
Ans is C
upvoted 2 times
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awscertified
2 years, 6 months ago
This question is outdated. Now you can expand VPCs. B. It is not possible to change the size of the VPC once it has been created
upvoted 4 times
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allexxf
2 years, 6 months ago
Not B because VPC can be expanded by adding a new CIDR. I think C, because you can add new CIDR in VPC.
upvoted 4 times
Asds
2 years, 6 months ago
Correct: https://aws.amazon.com/about-aws/whats-new/2017/08/amazon-virtual-private-cloud-vpc-now-allows-customers-to-expand-their-existing-vpcs/
upvoted 4 times
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