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Answer: Elastic IP
Route 53 is a DNS managed by AWS, but nothing prevents you from running your own DNS (it's just a software) on an EC2 instance. The trick of this question is that it's about EC2, running some software that needs a fixed IP, and not about Route 53 at all. Elastic IP DNS services are identified by a public IP, so you need to use Elastic IP. Incorrect options: Create a Load Balancer and an auto-scaling group - Load balancers do not provide an IP, instead they provide a DNS name, so this option is ruled out. Provide a static private IP - If you provide a private IP it will not be accessible from the internet, so this option is incorrect. Use Route 53 - Route 53 is a DNS service from AWS but the use-case talks about offering a DNS service using an EC2 instance, so this option is incorrect.
Author: LeetQuiz Editorial Team
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You are currently managing a public DNS service hosted on an EC2 instance. The DNS name of your service resolves to the IP address of this instance. You plan to upgrade your DNS service and aim to achieve this upgrade without any downtime to ensure continuous availability.
Which of the following options would enable you to perform this upgrade seamlessly?
A
Use Route 53
B
Provide a static private IP
C
Elastic IP
D
Create a Load Balancer and an auto scaling group
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