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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 443 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 443
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company is deploying an application that processes streaming data in near-real time. The company plans to use Amazon EC2 instances for the workload. The network architecture must be configurable to provide the lowest possible latency between nodes.
Which combination of network solutions will meet these requirements? (Choose two.)

  • A. Enable and configure enhanced networking on each EC2 instance.
  • B. Group the EC2 instances in separate accounts.
  • C. Run the EC2 instances in a cluster placement group.
  • D. Attach multiple elastic network interfaces to each EC2 instance.
  • E. Use Amazon Elastic Block Store (Amazon EBS) optimized instance types.
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Suggested Answer: AC 🗳️
by kaylaychy at May 31, 2021, 9:42 a.m.
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kaylaychy
Highly Voted 3 years, 7 months ago
I think A,C
upvoted 45 times
wilign
3 years, 7 months ago
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html
upvoted 4 times
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Vizz5585
3 years, 6 months ago
Correct. A and C. Additional ENIs dont increase performance.
upvoted 11 times
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gargaditya
Highly Voted 3 years, 6 months ago
A,C Placement groups are of 3 types: 1.Cluster- all ec2 on same underlying rack/host--helps for low latency scenarios but not highly available(rack failure) 2.Spread- one ec2 per rack /supports cross AZ 3.Partition- multiple ec2 on rack + can have multiple parititions(racks) /supports cross AZ ========================= D-Increasing nw interfaces will increase throughput but will not help address latency. ========================
upvoted 5 times
gargaditya
3 years, 6 months ago
Enhanced Networking: REF https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/enhanced-networking.html https://aws.amazon.com/premiumsupport/knowledge-center/enable-configure-enhanced-networking/ -Enhanced networking uses single root I/O virtualization (SR-IOV) to provide high-performance networking capabilities on supported instance types. -SR-IOV is a method of device virtualization that provides higher I/O performance and lower CPU utilization when compared to traditional virtualized network interfaces. -Enhanced networking provides higher bandwidth, higher packet per second (PPS) performance, and consistently lower inter-instance latencies. -There is no additional charge for using enhanced networking. -All current generation instance types support enhanced networking, except for T2 instances.
upvoted 3 times
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BECAUSE
Most Recent 1 year, 11 months ago
Selected Answer: AC
A and C are the answers
upvoted 1 times
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slcheng
2 years, 9 months ago
Selected Answer: AC
Agreed with A & C
upvoted 2 times
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VIHANARYA
2 years, 11 months ago
A and C
upvoted 1 times
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esinan
3 years ago
Selected Answer: AC
A and C
upvoted 2 times
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envest
3 years, 4 months ago
IMO: A,C; ENA is for lower inter-instance latencies. https://acloudyjourney.com/eni-ena-efa
upvoted 2 times
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keeplearning_rahul
3 years, 4 months ago
Selected Answer: AC
A and C address the ask
upvoted 1 times
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prex
3 years, 4 months ago
Selected Answer: AC
A,C for sure
upvoted 1 times
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vandergun
3 years, 5 months ago
Selected Answer: AC
should be A,C
upvoted 1 times
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Cabrera
3 years, 6 months ago
A and C "Enhanced networking provides higher bandwidth, higher packet-per-second (PPS) performance, and consistently lower inter-instance latencies."
upvoted 3 times
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spydii
3 years, 6 months ago
A and C, enable nitro for enhanced networking and higher IOPS, C for : lowest possible latency is provided by cluster-> partition-> Spread placement group.
upvoted 4 times
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BTAB
3 years, 6 months ago
A,C for sure If you need to reach speeds up to 10 Gbps between instances, launch your instances into a cluster placement group with the enhanced networking instance type. These instance types are placed physically close to each other, further reducing latency and improving transfer speeds. https://aws.amazon.com/premiumsupport/knowledge-center/enable-configure-enhanced-networking/
upvoted 3 times
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theCreatorSD
3 years, 6 months ago
ENI - ENA - EFA https://medium.com/nerd-for-tech/aws-networking-eni-ena-efa-2db316fdbf85
upvoted 4 times
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Elliea
3 years, 7 months ago
isn't enhanced networking a characteristic of ENI's?
upvoted 2 times
cnmc
3 years, 7 months ago
It is. But it's perfectly reasonable to thing of ENI as a "feature" of EC2 (it supports other stuffs too, but EC2 is clearly the most popular - and for some the only use of ENI)
upvoted 1 times
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Gats
3 years, 7 months ago
A and C
upvoted 3 times
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sic6sic
3 years, 7 months ago
AC is my take. A cluster placement group is a logical grouping of instances within a single Availability Zone that benefit from low network latency, high network throughput. Enhanced networking provides higher bandwidth, higher packet-per-second (PPS) performance, and consistently lower inter-instance latencies.
upvoted 4 times
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