Exam ANS-C00 topic 1 question 267 discussion

Exam question from Amazon's ANS-C00

Question #: 267
Topic #: 1

You have several VPCs that are peered. Each VPC has several routes to different subnets. Over the years, your company has acquired many companies. You find that traffic destined for one VPC ends up going to another.
What is the best way to remedy this?

A. Move the route table entry for the proper VPC higher in the list.
B. Adjust your routes so the proper VPC has a higher CIDR.
C. Move the route table entry for the proper VPC lower in the list.
D. Adjust your routes so the proper VPC has a lower CIDR.

Show Suggested Answer

Suggested Answer: B 🗳️

by Huntkey at Feb. 19, 2021, 8:17 p.m.

Disclaimers:

- ExamTopics website is not related to, affiliated with, endorsed or authorized by Amazon.
- Trademarks, certification & product names are used for reference only and belong to Amazon.

Comments

Submit Cancel

lemist

3 years ago

If you have a VPC peered with multiple VPCs that have overlapping or matching CIDR blocks, ensure that your route tables are configured to avoid sending response traffic from your VPC to the incorrect VPC. AWS currently does not support unicast reverse path forwarding in VPC peering connections that checks the source IP of packets and routes reply packets back to the source. https://docs.aws.amazon.com/vpc/latest/peering/peering-configurations-partial-access.html#peering-incorrect-response-routing

upvoted 1 times

...

clooudy

3 years ago

Selected Answer: B

Badly worded question...say more specific route not higher CIDR Answer:B

upvoted 4 times

...

MohamedSherif1

3 years ago

B. Adjust your routes so the proper VPC has a higher CIDR.

upvoted 1 times

...

ptpho

3 years, 7 months ago

Ans B { Higher CIDR = higher SM = smaller subnet (More specific) }

upvoted 1 times

...

ChauPhan

3 years, 7 months ago

B. Adjust your routes so the proper VPC has a higher CIDR. Me to, assume higher is more specific

upvoted 1 times

...

eeghai7thioyaiR4

3 years, 8 months ago

I guess B, and "higher" means "more specific" ?

upvoted 2 times

wahlbergusa

3 years, 7 months ago

Yes. And these people who prepare these questions should immediately get sacked. And this is called "Advanced Networking Specialty Exam" for God' s sake.

upvoted 3 times

...

Huntkey

3 years, 8 months ago

So I assume "higher" means that 10.10.10.0/24 is higher in value than 10.10.0.0/16, for the network part. Clearly it is not comparing the subnet mask value...

upvoted 2 times

...