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Alibaba ACA-Developer Exam - Topic 3 Question 29 Discussion

An Elastic Compute Service (ECS) instance (private IP only) needs to read data from a RDS MySQL database in another VPC through a private IP address, and at the same time, RDS's public internet endpoint needs to be available for requests from some internet clients. Which steps must be taken to allow applications to access this RDS instance via both interfaces? (Number of correct answers: 2)
D) Configure a NAT gateway for the VPC to which the ECS instance belongs.
A) Make sure that the security group of the ECS instance allows outbound access to the MySQL service port.
B) Add the private and public IP addresses of all applications to the RDS whitelist.
C) Connect the two VPCs through CEN.

Alibaba ACA-Developer Exam - Topic 3 Question 29 Discussion

Actual exam question for Alibaba's ACA-Developer exam
Question #: 29
Topic #: 3
[All ACA-Developer Questions]

An Elastic Compute Service (ECS) instance (private IP only) needs to read data from a RDS MySQL database in another VPC through a private IP address, and at the same time, RDS's public internet endpoint needs to be available for requests from some internet clients. Which steps must be taken to allow applications to access this RDS instance via both interfaces? (Number of correct answers: 2)

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Suggested Answer: D

by Clay at Aug 21, 2022, 03:42 PM

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Johanna
10 months ago
I agree with C, but I’m not sure about D.
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Delila
10 months ago
Wait, do we really need a NAT gateway for this?
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Jannette
10 months ago
B seems unnecessary, just use security groups.
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Glenn
11 months ago
I think C is the right move to connect those VPCs.
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Deandrea
11 months ago
A is definitely needed for outbound access.
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Cherelle
11 months ago
I’m a bit confused about the NAT gateway; I thought it was mainly for outbound internet access, not for connecting to RDS, so I’m not sure about option D.
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Dominga
11 months ago
I practiced a question similar to this, and I think whitelisting IPs is usually necessary, so option B might be correct too.
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Dick
11 months ago
I'm not entirely sure, but I feel like connecting the VPCs through CEN could be important for private communication, so maybe option C?
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Mitsue
11 months ago
I remember something about security groups being crucial for allowing outbound access, so I think option A makes sense.
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Chantay
11 months ago
This seems like a straightforward question about email security policies. I'll carefully read through the options and think about the most likely reason the email was filtered.
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Rosalind
11 months ago
Ah, I see now. Save, compile, and then freeze the definition. Got it. This exam question is straightforward if you know the process.
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Mirta
11 months ago
Okay, I've got this. The question is asking what needs to be decided before considering the treatment of risks. That means we need to establish the criteria for determining risk acceptance first, which is option A.
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