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Exam ANS-C00 topic 1 question 106 discussion

Exam question from Amazon's ANS-C00
Question #: 106
Topic #: 1
[All ANS-C00 Questions]

A company provisions an AWS Direct Connect connection to permit access to Amazon EC2 resources in several Amazon VPCs and to data stored in private
Amazon S3 buckets. The Network Engineer needs to configure the company's on-premises router for this Direct Connect connection.
Which of the following actions will require the LEAST amount of configuration overhead on the customer router?

  • A. Configure private virtual interfaces for the VPC resources and for Amazon S3.
  • B. Configure private virtual interfaces for the VPC resources and a public virtual interface for Amazon S3.
  • C. Configure a private virtual interface to a Direct Connect gateway for the VPC resources and for Amazon S3.
  • D. Configure a private virtual interface to a Direct Connect gateway for the VPC resources and a public virtual interface for Amazon S3.
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Suggested Answer: D 🗳️
by adrianlee2593 at May 7, 2020, 8:15 p.m.
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adrianlee2593
Highly Voted 3 years, 7 months ago
D. S3 is in a public zone and would require a public VIF
upvoted 19 times
RtwoDtwo
3 years, 7 months ago
In addition, the requirement is to connect to multiple VPCs and hence Dx Gateway is needed. Answer: D
upvoted 13 times
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inf
Highly Voted 3 years, 7 months ago
Answer: D B & D are both possible, however, the question clearly states LEAST amount of configuration on the CUSTOMER ROUTER. That means with B, 4 x VIFs = 4 x Router Configurations. Whereas A is 1 x VIF = 1 x Router Configuration
upvoted 9 times
inf
3 years, 7 months ago
type: Whereas D is 1 x VIF = 1 x Router Configuration
upvoted 3 times
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Kentik
3 years, 7 months ago
after reading the question again i agree with you, it says "permit access to Amazon EC2 in several Amazon VPC and to data in private S3 Buckets". To connect to multiple VPC a DX Gateway is better for the on-prem router. Only needs 1 private VIF and 1 public VIF.
upvoted 1 times
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slackbot
Most Recent 2 years, 1 month ago
with VPC interface endpoint, option C is also a solution. only DNS has to be fixed, but this can be achieved within a day, while provisioning a public VIF could take a few days. so I would say C
upvoted 1 times
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ongre_
2 years, 9 months ago
Selected Answer: D
Answer is D because it represents less overhead on the customer router, since you'll only have to create on VIF to the DX gateway. For B, you have to create several private VIFs for all the VPCs to allow connection through
upvoted 2 times
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kret
2 years, 11 months ago
Selected Answer: B
I will go with B. No specific need for DX Gateway (no multiple regions), and DX Gateway is limiting number of connected VPCs 5 times... (max 10). See no reason to use it here.
upvoted 1 times
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clooudy
3 years ago
Selected Answer: D
Priv VIF to a DGW for VPC and a public VIF for S3
upvoted 1 times
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sapien45
3 years, 1 month ago
Private s3 bucket is here to confuse. It still needs public access meaning a public VIF
upvoted 1 times
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ChauPhan
3 years, 6 months ago
D. If you connect with several VPCs, you have to use Direct Connect Gateway, no doubt. And S3 must use public virtual interface
upvoted 3 times
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RaghuRajm
3 years, 7 months ago
D is correct answer. One private VIF to DX gateway and attache all VPCs to DX gateway. Only one BGP configuration required for on-premise router. One pubic VIF to access public resources like S3.
upvoted 3 times
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sensor
3 years, 7 months ago
Its B. Interface - Gateway endpoint for VPC access and public VIF for DX.
upvoted 2 times
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shafeeqsa
3 years, 7 months ago
its on the on-prem router you dont need DX gateay on on-prem router. So B
upvoted 2 times
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exmjame
3 years, 7 months ago
B & D are same with incorrect wording.
upvoted 1 times
StelSen
3 years, 6 months ago
Direct Connect Gateway can connect to multiple VPCs. So, its not incorrect wording.
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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