AWS Certified Advanced Networking – Specialty (ANS-C01)Network ImplementationMedium
A financial services company is deploying a new critical application in AWS that requires extremely low latency and high network throughput between its EC2 instances. The application architecture involves several tightly coupled microservices communicating frequently. The company needs to ensure that these instances are placed in a way that minimizes network jitter and maximizes bandwidth. Which AWS networking feature should a solutions architect recommend to meet these requirements?
- ASpread Placement Group
- BCluster Placement Group
- CPartition Placement Group
- DDedicated Hosts
Show answer & explanationAnswer & explanation
Correct answer: B. Cluster Placement Group
Cluster Placement Groups are designed for applications that benefit from low network latency, high network throughput, or both, by placing instances close together within a single Availability Zone. This ensures the best possible network performance between the instances, which is critical for tightly coupled microservices.
Why the other options are wrong
- A. Spread Placement Groups place instances on distinct underlying hardware to reduce correlated failures, which is not focused on low latency or high throughput.
- C. Partition Placement Groups divide instances into logical partitions to reduce the impact of hardware failures, not to optimize network performance between them.
- D. Dedicated Hosts provide dedicated physical servers for EC2 instances for licensing or compliance, but do not inherently guarantee low latency or high throughput between instances like a Cluster Placement Group does.
Cluster Placement Group
A logical grouping of instances within a single Availability Zone that helps applications achieve low network latency, high network throughput, or both.
- Places instances close together within an AZ.
- Ideal for tightly coupled applications.
- Can only span a single Availability Zone.
Memory trick: Clusters huddle for speed, Spreads keep their distance, Partitions divide and conquer.