Exam AWS Certified Advanced Networking - Specialty ANS-C01 All Questions

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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 171 discussion

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

Question #: 171
Topic #: 1

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

A company has a total of 30 VPCs. Three AWS Regions each contain 10 VPCs. The company has attached the VPCs in each Region to a transit gateway in that Region. The company also has set up inter-Region peering connections between the transit gateways.

The company wants to use AWS Direct Connect to provide access from its on-premises location for only four VPCs across the three Regions. The company has provisioned four Direct Connect connections at two Direct Connect locations.

Which combination of steps will meet these requirements MOST cost-effectively? (Choose three.)

A. Create four virtual private gateways. Attach the virtual private gateways to the four VPCs.
B. Create a Direct Connect gateway. Associate the four virtual private gateways with the Direct Connect gateway.
C. Create four transit VIFs on each Direct Connect connection. Associate the transit VIFs with the Direct Connect gateway.
D. Create four transit VIFs on each Direct Connect connection. Associate the transit VIFs with the four virtual private gateways.
E. Create four private VIFs on each Direct Connect connection to the Direct Connect gateway.
F. Create an association between the Direct Connect gateway and the transit gateways.

Show Suggested Answer

Suggested Answer: ABE 🗳️

by backspace0900 at March 20, 2024, 12:25 p.m.

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Comments

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psou7

Highly Voted 1 year, 3 months ago

ABE TGW for inter VPC peering within AWS. From on-prem access to only 4 VPCs is required. Hence DXGW and VGW via private VIF. Peering TGW with DXGW would be possible for on-prem connectivity but is more costly. https://docs.aws.amazon.com/whitepapers/latest/hybrid-connectivity/aws-dx-dxgw-with-vgw-multi-regions-and-aws-public-peering.html

upvoted 11 times

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Nouwara

Most Recent 1 month, 4 weeks ago

Selected Answer: BCF

as there is already a TGW, why nor use it

upvoted 1 times

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Hubabi

4 months ago

Selected Answer: ABE

From the options presented, it's clear that you need to use DXGW. The only option where "Create a Direct Connect gateway" is stated is option (B). Option (B) also states "Associate the four virtual private gateways with the Direct Connect gateway", thus you need to pick the other two remaining options that make sense with VGW - (A) and (E). Regardless what the cost is, this is the only valid answer that you can select.

upvoted 1 times

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woorkim

6 months, 3 weeks ago

Selected Answer: ABE

TGW is asking more cost!

upvoted 2 times

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MO_SAM

8 months, 3 weeks ago

Selected Answer: BCF

Since there already and exciting TWG there is no need to create VGW and private VIFs, instead just create 4 transit VIF along with DXGW and association to connect things together and hence COST is the main factor!

upvoted 1 times

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VerRi

9 months ago

Selected Answer: ABE

BCF is a good practice but ABE is cheaper.

upvoted 1 times

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AlirezaNetWorld

9 months, 2 weeks ago

BCF based on the current setup on AWS.

upvoted 1 times

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cerifyme85

1 year, 2 months ago

Selected Answer: ABE

TGW for inter VPC peering within AWS. From on-prem access to only 4 VPCs is required. Hence DXGW and VGW via private VIF. Peering TGW with DXGW would be possible for on-prem connectivity but is more costly.

upvoted 3 times

cerifyme85

1 year, 2 months ago

If the option was to use TGW, they would have provided an option in the answer to connect DX Gateway to TGW. Also the conectivity to "only" for VPCs does not affect the architecture design as Psou7 said, and given the above, both VPG and TG would work, it is just which one is less expensive.. OR which combination of answers helps. VPG ==> VPG +DXG + PVIF TGW ==> TGW + DXG + TVIF The above options ==> so ABE

upvoted 2 times

victian

3 months, 3 weeks ago

if use TGW ==> TGW + DXG + TVIF solution，option C and F are enough？

upvoted 1 times

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cerifyme85

1 year, 2 months ago

Also only need one TGW per region .. we have 3 regions, question does not give the split per region.... so not 4 TGW

upvoted 1 times

cerifyme85

1 year, 2 months ago

Sorry guys just an adjustment in understanding : connecting to VPC directly ==> PVIF + DXG + VPG

upvoted 2 times

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KobDragoon

1 year, 2 months ago

Selected Answer: ABE

As there is no answer that allows us to configure specific route tables in the TGW to make the DataCenters really only have access to 4 of the 30 VPCs. The most logical solution is ABE, as the other options would allow access to more VPCs than intended.

upvoted 4 times

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tromyunpak

1 year, 3 months ago

ABE are the correct answer as these are required to build the VPG setup. CD are wrong due to the fact all the VPC will access the onpremises (you need to configure the 4 specific VPC prefixes in the DX gateway to TGW association or use different routing tables within the TGW to limit the routes to only the 4 VPCs required to access the on-premises) F is not needed since VPG will be used

upvoted 2 times

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backspace0900

1 year, 3 months ago

Selected Answer: BCF

BCF DirectConnectGateway TransitVIF TransitGateway

upvoted 3 times

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