Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 73 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01

Question #: 73
Topic #: 1

[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company is developing an application in which IoT devices will report measurements to the AWS Cloud. The application will have millions of end users. The company observes that the IoT devices cannot support DNS resolution. The company needs to implement an Amazon EC2 Auto Scaling solution so that the IoT devices can connect to an application endpoint without using DNS.

Which solution will meet these requirements MOST cost-effectively?

A. Use an Application Load Balancer (ALB)-type target group for a Network Load Balancer (NLB). Create an EC2 Auto Scaling group. Attach the Auto Scaling group to the ALB. Set up the IoT devices to connect to the IP addresses of the NLB.
B. Use an AWS Global Accelerator accelerator with an Application Load Balancer (ALB) endpoint. Create an EC2 Auto Scaling group. Attach the Auto Scaling group to the ALSet up the IoT devices to connect to the IP addresses of the accelerator.
C. Use a Network Load Balancer (NLB). Create an EC2 Auto Scaling group. Attach the Auto Scaling group to the NLB. Set up the IoT devices to connect to the IP addresses of the NLB.
D. Use an AWS Global Accelerator accelerator with a Network Load Balancer (NLB) endpoint. Create an EC2 Auto Scaling group. Attach the Auto Scaling group to the NLB. Set up the IoT devices to connect to the IP addresses of the accelerator.

Show Suggested Answer

Suggested Answer: C 🗳️

by ITgeek at April 24, 2023, 4:48 p.m.

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FayeG

Highly Voted 1 year, 8 months ago

Selected Answer: D

The answer requires one to provide the IoT a single IP address. If you use NLB it gives you only one static (or EIP) per AZ. Thus resulting in multiple IP addreses. However a GA can provide a single front end IP to all the static (or EIP) addresses used by the NLB. Thus using an NLB alone is rulled out. Therefore the GA is the correct option. If the Q had stated that the applications where all in the same subnet then C would be correct. but it doesn't so this can't be assumed. See https://aws.amazon.com/elasticloadbalancing/network-load-balancer/

upvoted 12 times

Spaurito

7 months, 3 weeks ago

D - agree, because they can't use DNS resolution, this solution fits the requirements.

upvoted 1 times

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rhinozD

Highly Voted 2 years, 2 months ago

Selected Answer: C

B, C, and D are also doable. Let's think about the cost. AWS Global Accelerator is definitely the best option. but it costs more money. NLB is enough. -> C.

upvoted 11 times