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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 156 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 156
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A network engineer needs to design the architecture for a high performance computing (HPC) workload. Amazon EC2 instances will require 10 Gbps flows and an aggregate throughput of up to 100 Gbps across many instances with low-latency communication.

Which architecture solution will optimize this workload?

  • A. Place nodes in a single subnet of a VPC. Configure a cluster placement group. Ensure that the latest Elastic Fabric Adapter (EFA) drivers are installed on the EC2 instances with a supported operating system.
  • B. Place nodes in multiple subnets in a single VPC. Configure a spread placement group. Ensure that the EC2 instances support Elastic Network Adapters (ENAs) and that the drivers are updated on each instance operating system.
  • C. Place nodes in multiple VPCs Use AWS Transit Gateway to route traffic between the VPCs. Ensure that the latest Elastic Fabric Adapter (EFA) drivers are installed on the EC2 instances with a supported operating system.
  • D. Place nodes in multiple subnets in multiple Availability Zones. Configure a cluster placement group. Ensure that the EC2 instances support Elastic Network Adapters (ENAs) and that the drivers are updated on each instance operating system.
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Suggested Answer: A 🗳️
by ISSDoksim at July 27, 2023, 9:22 a.m.
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Manh
Highly Voted 1 year, 2 months ago
Selected Answer: A
Option A is the most suitable solution for the high-performance computing workload: Cluster Placement Group: A cluster placement group ensures that EC2 instances are placed close together within the same Availability Zone to minimize network latency and provide high-bandwidth, low-latency communication between instances. This is crucial for an HPC workload where low-latency communication is essential. Single Subnet of a VPC: Placing nodes in a single subnet of a VPC ensures that the EC2 instances are closely located within the same subnet, further reducing network latency. Elastic Fabric Adapter (EFA): EFA is a network interface designed specifically for HPC workloads that require low-latency and high-bandwidth communication. Using EFA drivers on EC2 instances ensures optimal performance for communication between instances.
upvoted 6 times
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[Removed]
Most Recent 5 months, 3 weeks ago
quick check: A cluster in one subnet, EFA, bingo B: spread --- nope C: TGW --> max 50Gb/s --nope D: multiple subnets -- nope
upvoted 1 times
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Hoversteng
9 months ago
Selected Answer: A
A is correct
upvoted 2 times
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Certified101
1 year, 2 months ago
Selected Answer: A
A indeed correct
upvoted 3 times
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ISSDoksim
1 year, 2 months ago
A https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html#placement-groups-limitations-spread
upvoted 1 times
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