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Answer: Create a new private subnet to hold the required EC2 instances.
Once a subnet is created in AWS, its CIDR block cannot be modified or resized, and subnets are strictly bound to a single Availability Zone. To deploy more EC2 instances when the current subnet has run out of available IP addresses, you must create a new subnet with an available CIDR block within the VPC and launch the instances into the new subnet.
Author: Ritesh Yadav
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Question #63 A CloudOps engineer creates a new VPC that includes a public subnet and a private subnet. The CloudOps engineer successfully launches 11 Amazon EC2 instances in the private subnet. The CloudOps engineer attempts to launch one more EC2 instance in the same subnet. However, the CloudOps engineer receives an error message that states that not enough free IP addresses are available. What must the CloudOps engineer 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.
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