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Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 116 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional SAP-C02
Question #: 116
Topic #: 1
[All AWS Certified Solutions Architect - Professional SAP-C02 Questions]

A retail company has an on-premises data center in Europe. The company also has a multi-Region AWS presence that includes the eu-west-1 and us-east-1 Regions. The company wants to be able to route network traffic from its on-premises infrastructure into VPCs in either of those Regions. The company also needs to support traffic that is routed directly between VPCs in those Regions. No single points of failure can exist on the network.

The company already has created two 1 Gbps AWS Direct Connect connections from its on-premises data center. Each connection goes into a separate Direct Connect location in Europe for high availability. These two locations are named DX-A and DX-B, respectively. Each Region has a single AWS Transit Gateway that is configured to route all inter-VPC traffic within that Region.

Which solution will meet these requirements?

  • A. Create a private VIF from the DX-A connection into a Direct Connect gateway. Create a private VIF from the DX-B connection into the same Direct Connect gateway for high availability. Associate both the eu-west-1 and us-east-1 transit gateways with the Direct Connect gateway. Peer the transit gateways with each other to support cross-Region routing.
  • B. Create a transit VIF from the DX-A connection into a Direct Connect gateway. Associate the eu-west-1 transit gateway with this Direct Connect gateway. Create a transit VIF from the DX-8 connection into a separate Direct Connect gateway. Associate the us-east-1 transit gateway with this separate Direct Connect gateway. Peer the Direct Connect gateways with each other to support high availability and cross-Region routing.
  • C. Create a transit VIF from the DX-A connection into a Direct Connect gateway. Create a transit VIF from the DX-B connection into the same Direct Connect gateway for high availability. Associate both the eu-west-1 and us-east-1 transit gateways with this Direct Connect gateway. Configure the Direct Connect gateway to route traffic between the transit gateways.
  • D. Create a transit VIF from the DX-A connection into a Direct Connect gateway. Create a transit VIF from the DX-B connection into the same Direct Connect gateway for high availability. Associate both the eu-west-1 and us-east-1 transit gateways with this Direct Connect gateway. Peer the transit gateways with each other to support cross-Region routing.
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Suggested Answer: D 🗳️
by masetromain at Jan. 15, 2023, 4:52 p.m.
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God_Is_Love
Highly Voted 2 years, 1 month ago
Selected Answer: D
https://docs.aws.amazon.com/images/whitepapers/latest/hybrid-connectivity/images/dx-dxgw-transit-gateway-multi-region-public-vif.png B is wrong as it says, two DX Gateways contradictory C is wrong as it says to configure DXG to route traffic. infact Transit gateway peering need to be done between two transit gateways of each reigon. A is wrong because Private VIF is not apt in mentioned config of the question. Public VIF is correct (Transit public VIF) If you are using a single DX Gateway
upvoted 16 times
God_Is_Love
2 years, 1 month ago
Whichever option has this text is correct - "Peer the transit gateways with each other to support cross-Region routing"
upvoted 5 times
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Syre
Most Recent 7 months, 1 week ago
Selected Answer: C
While transit gateway peering can enable cross-Region VPC communication, it is not necessary when you are using a Direct Connect gateway. A Direct Connect gateway already provides the capability to route traffic across multiple Regions without needing to peer the transit gateways directly.
upvoted 2 times
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amministrazione
7 months, 3 weeks ago
D. Create a transit VIF from the DX-A connection into a Direct Connect gateway. Create a transit VIF from the DX-B connection into the same Direct Connect gateway for high availability. Associate both the eu-west-1 and us-east-1 transit gateways with this Direct Connect gateway. Peer the transit gateways with each other to support cross-Region routing.
upvoted 1 times
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teo2157
1 year ago
It can be both A or D based on AWS documentation: https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/hybrid-network-connections.html
upvoted 2 times
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Dgix
1 year, 1 month ago
Selected Answer: D
Don't let "No single points of failure can exist on the network" mislead you into thinking that you need two DCGWs. DCGWs are not part of the region they connect to. Therefore, no SPOF translates to a double DC connection to a single DCGW. Hence, D.
upvoted 1 times
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gofavad926
1 year, 1 month ago
Selected Answer: D
D, this approach ensures high availability and robust network connectivity across the specified AWS regions and the on-premises data center.
upvoted 1 times
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_Jassybanga_
1 year, 2 months ago
Answer D - As per from AWS https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-aws-transit-gateway-multi-regions-more-than-3.html
upvoted 3 times
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career360guru
1 year, 4 months ago
Selected Answer: D
Choice is between C and D. Better the two D is the right option.
upvoted 1 times
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subbupro
1 year, 4 months ago
D is correct ref architecture https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-aws-transit-gateway-multi-regions-and-aws-public-peering.html
upvoted 4 times
mnsait
5 months ago
This is the best answer I found for this question. Thank you @subbupro for the reference. It explains exactly what is needed to understand here.
upvoted 1 times
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shaaam80
1 year, 4 months ago
Selected Answer: D
Answer D. Peer the transit gateways for cross-region routing.
upvoted 1 times
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severlight
1 year, 5 months ago
Selected Answer: D
to connect to transit gateways through the dx gateway you should use transit VIF
upvoted 1 times
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frfavoreto
1 year, 7 months ago
I agree 'D' is a good answer to the problem, but isn't the DXGW a single point of failure? Question says "No single points of failure can exist on the network."
upvoted 2 times
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NikkyDicky
1 year, 9 months ago
Selected Answer: D
it's D
upvoted 1 times
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happystrawberry
1 year, 11 months ago
Would it be C for the answer? A Direct Connect gateway supports communication between attached transit virtual interfaces and associated transit gateways only and may enable a virtual private gateway to another virtual private gateway. https://docs.aws.amazon.com/directconnect/latest/UserGuide/direct-connect-transit-gateways.html
upvoted 1 times
happystrawberry
1 year, 11 months ago
Actually, D is a proper answer.
upvoted 1 times
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rbm2023
1 year, 11 months ago
Selected Answer: D
I agree with option D Refer to the diagram below which explains in detail the use of Transit VIF and Public VIF. Also demonstrates the necessity for peering the transit gateways to allow the cross-region routing. https://docs.aws.amazon.com/images/whitepapers/latest/hybrid-connectivity/images/dx-dxgw-transit-gateway-multi-region-public-vif.png The only options that are using the cross-region routing are A and D. Option A mentions the use of Private VIF and not the Transit VIF. Hence A is incorrect.
upvoted 4 times
rbm2023
1 year, 11 months ago
Refer to the following article https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-aws-transit-gateway-multi-regions-and-aws-public-peering.html
upvoted 3 times
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dev112233xx
2 years ago
Selected Answer: D
Transit VIF required to connect to Transit Gateway, and Transit peering is required to connect multi regions... Here is the full diagram: https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-aws-transit-gateway-multi-regions-and-aws-public-peering.html
upvoted 3 times
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mfsec
2 years, 1 month ago
Selected Answer: D
D is the answer
upvoted 2 times
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