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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 149 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 149
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company has three VPCs in a single AWS Region. Each VPC contains 15 Amazon EC2 instances, and no connectivity exists between the VPCs.

The company is deploying a new application across all three VPCs. The application requires high bandwidth between the nodes. A network engineer must implement connectivity between the VPCs.

Which solution will meet these requirements with the HIGHEST throughput?

  • A. Configure a transit gateway. Attach each VPC to the transit gateway. Configure static routing in each VPC to route traffic to the transit gateway.
  • B. Configure VPC peering between the three VPCs. Configure static routing to route traffic between the three VPCs.
  • C. Configure a transit VPConfigure a VPN gateway in each VPCreate an AWS Site-to-Site VPN tunnel from each VPC to the transit VPUse BGP routing to route traffic between the VPCs and the transit VPC.
  • D. Configure AWS Site-to-Site VPN connections between each VPC. Enable route propagation for each Site-to-Site VPN connection to route traffic between the VPCs.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by Neo00 at July 25, 2023, 7:09 p.m.
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sambb
Highly Voted 1 year, 10 months ago
Selected Answer: B
VPC peering has no bandwidth limit unlike Transit Gateway (50Gb/s per VPC attachment) https://d1.awsstatic.com/whitepapers/building-a-scalable-and-secure-multi-vpc-aws-network-infrastructure.pdf "No bandwidth limits — With Transit Gateway, Maximum bandwidth (burst) per Availability Zone per VPC connection is 50 Gbps. VPC peering has no aggregate bandwidth. "
upvoted 11 times
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AzureDP900
Most Recent 5 months, 3 weeks ago
Selected Answer: A
The correct answer is: A. Configure a transit gateway, attach each VPC to it, and use static routing in each VPC to route traffic to the transit gateway.
upvoted 1 times
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woorkim
6 months, 2 weeks ago
Selected Answer: B
No bandwidth limits — With Transit Gateway, Maximum bandwidth (burst) per Availability Zone per VPC connection is 50 Gbps. VPC peering has no aggregate bandwidth. Individual instance network performance limits and flow limits (10 Gbps within a placement group and 5 Gbps otherwise) apply to both options. Only VPC peering supports placement groups.
upvoted 1 times
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46f094c
7 months ago
Selected Answer: B
It doesn't ask about scalability or management, it asks about the HIGHEST throughput -> B
upvoted 1 times
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jhon648274
10 months, 1 week ago
Answer is A VPC peering does not require static routes to be setup Transit gateway peering provides connectivity to all VPCs and its high throughput
upvoted 1 times
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cerifyme85
1 year, 2 months ago
Selected Answer: A
Answer is A. VPC routing is non-transitive, how do you route across all VPC. This what Transit Gateways solves
upvoted 1 times
seochan
1 year ago
they only have 3 VPCs.
upvoted 1 times
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cerifyme85
1 year, 2 months ago
Answer is A. VPC routing is non-transitive, how do you route across all VPC. This what Transit Gateways solves
upvoted 1 times
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vikasj1in
1 year, 4 months ago
Selected Answer: A
In this case, configuring a transit gateway and attaching each VPC to it will provide the highest throughput. The transit gateway allows for more efficient routing of traffic between VPCs compared to VPC peering or Site-to-Site VPN connections. Option B (VPC peering) has limitations on bandwidth and does not scale as well when compared to a transit gateway. Option C (transit VPC with VPN connections) can introduce additional complexity and may not provide as high throughput as a transit gateway. Option D (AWS Site-to-Site VPN connections between each VPC) may work but can introduce additional latency and may not scale as well as a transit gateway. Therefore, option A is the preferred solution for achieving the highest throughput and efficient connectivity between the VPCs.
upvoted 2 times
[Removed]
1 year, 2 months ago
better check your attitude towards option B before you sit the exam :)
upvoted 2 times
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jorgesoma
1 year, 5 months ago
Non clear correct answer. I think it could be B, better than A.
upvoted 1 times
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VijayKamisetty
1 year, 9 months ago
Selected Answer: B
VPC peering is free and also no bandwidth limit compared to 50Gbps limit for a TGW attachment
upvoted 4 times
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Nyang2
1 year, 10 months ago
https://docs.aws.amazon.com/vpc/latest/peering/what-is-vpc-peering.html There is no single point of failure for communication or a bandwidth bottleneck.
upvoted 3 times
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Manh
1 year, 10 months ago
Selected Answer: A
Transit gateways are designed for high bandwidth and low-latency communication, making them an ideal choice for scenarios where high throughput between multiple VPCs is required. Each attachment to the transit gateway can support up to 50 Gbps of bandwidth, and multiple VPCs can share the same transit gateway without any direct peering relationship between them.
upvoted 4 times
ChinkSantana
1 year, 4 months ago
No bandwidth limits — With Transit Gateway, Maximum bandwidth (burst) per Availability Zone per VPC connection is 50 Gbps. VPC peering has no aggregate bandwidth. Individual instance network performance limits and flow limits (10 Gbps within a placement group and 5 Gbps otherwise) apply to both options. B: VPC peering
upvoted 1 times
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Neo00
1 year, 10 months ago
Selected Answer: A
Maximum bandwidth per VPC attachment, AWS Direct Connect gateway, or peered transit gateway connection, Up to 50 Gbps
upvoted 1 times
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C (25%)
B (20%)
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