ExamTopics Logo
Mail Us[email protected]
Menu
Amazon Discussions
exam questions

Exam ANS-C00 All Questions

View all questions & answers for the ANS-C00 exam
Go to Exam

Exam ANS-C00 topic 1 question 4 discussion

Exam question from Amazon's ANS-C00
Question #: 4
Topic #: 1
[All ANS-C00 Questions]

You are designing the network infrastructure for an application server in Amazon VPC. Users will access all the application instances from the Internet and from an on-premises network. The on-premises network is connected to your VPC over an AWS Direct Connect link.
How should you design routing to meet these requirements?

  • A. Configure a single routing table with two default routes: one to the Internet via an IGW, the other to the on-premises network via the VGW. Use this routing table across all subnets in your VPC.
  • B. Configure two routing tables: one that has a default route via the IGW, and another that has a default route via the VGW. Associate both routing tables with each VPC subnet.
  • C. Configure a single routing table with a default route via the IGW. Propagate a default route via BGP on the AWS Direct Connect customer router. Associate the routing table with all VPC subnet.
  • D. Configure a single routing table with a default route via the IGW. Propagate specific routes for the on-premises networks via BGP on the AWS Direct Connect customer router. Associate the routing table with all VPC subnets.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by Milind at Oct. 20, 2019, 8:21 a.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

Chosen Answer:
This is a voting comment (?). It is better to Upvote an existing comment if you don't have anything to add.
Switch to a voting comment New
Submit Cancel
Milind
Highly Voted 3 years, 7 months ago
D is correct
upvoted 18 times
sapien45
3 years, 2 months ago
Thank you so much for providing explanations to your answer .... useless
upvoted 4 times
Balki
2 years, 4 months ago
Thank you very much for the explanation provided for the explanation given above. Very useful
upvoted 1 times
...
...
...
Ajani
Highly Voted 3 years, 7 months ago
D is correct. A and B are off because of order of precedence, static route via the IGW has precedence over static from Dx. C is out, bcos you're not allowed to advertise default prefix via bgp, AWS will only accept 1,000 prefixes from you. D: specific /24 (minimum) will be advertised and you have own the IP space,which aws will validate from regional inet registries.
upvoted 9 times
justfmm
3 years, 1 month ago
https://aws.amazon.com/premiumsupport/knowledge-center/troubleshoot-bgp-dx/ For C: If you have more than 100 networks in your on-premises network, then you can advertise a default route over the BGP session to AWS.
upvoted 2 times
...
...
greyhats13
Most Recent 2 years, 3 months ago
Selected Answer: D
Option A is incorrect because having two default routes in the same routing table is not a best practice as it may cause routing ambiguity and unexpected traffic behavior. Option B is incorrect because it does not utilize the benefits of propagating routes via BGP, which is a scalable and robust solution for establishing communication between an on-premises network and a VPC. Option C is incorrect because it does not cover the case of routing to specific routes on the on-premises network. Option D is the correct answer because it provides a single default route to the Internet via IGW and allows for specific routes to the on-premises network to be propagated via BGP on the AWS Direct Connect customer router. This option allows for communication between the VPC and the on-premises network while providing a scalable and robust solution.
upvoted 1 times
...
PavanKushwah123
2 years, 4 months ago
Selected Answer: D
Correct Answer D
upvoted 1 times
...
clooudy
2 years, 12 months ago
Selected Answer: D
Answer:D 0/0 to IGW and advertise specific routes or (10/8) from onprem to VGW and propogate to VPC
upvoted 1 times
...
ChauPhan
3 years, 6 months ago
D. Configure a single routing table with a default route via the IGW. Propagate specific routes for the on-premises networks via BGP on the AWS Direct Connect customer router. Associate the routing table with all VPC subnets.
upvoted 2 times
...
Johnny_Green
3 years, 7 months ago
A is incorrect because if both the AWS Direct Connect and IGW have a default route, the static route for the IGW would win and no traffic would get routed to the Direct Connect. B is incorrect because a subnet can only be associated with one route table at a time. C is incorrect because it makes no sense to advertise a default route via BGP. This left us with D as the correct answer.
upvoted 5 times
ChauPhan
3 years, 6 months ago
A is incorrect because you can't have 02 default routes in one route table.
upvoted 2 times
...
justfmm
3 years, 1 month ago
https://aws.amazon.com/premiumsupport/knowledge-center/troubleshoot-bgp-dx/ For C: If you have more than 100 networks in your on-premises network, then you can advertise a default route over the BGP session to AWS.
upvoted 1 times
...
...
SilverT
3 years, 7 months ago
My take is D
upvoted 1 times
...
backfringe
3 years, 7 months ago
agree it's D
upvoted 2 times
...
Wpcorgan
3 years, 7 months ago
Is D the correct answer?
upvoted 2 times
...
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.

Upvoting a comment with a selected answer will also increase the vote count towards that answer by one. So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.

SaveCancel
exam
Someone Bought Contributor Access for:
SY0-701
London, 1 minute ago