SAA-C03 Q558 · Networking

Question

A company has an industrial application that controls a process in real time. The company plans to rearchitect the application to distribute jobs across several Amazon EC2 instances in a VPC. The solution needs to maximize the network throughput and minimize the network latency between the instances. Which solution will meet these requirements?

Accepted Answer

**Answer D: Cluster placement group + enhanced networking** satisfies both requirements:

1. **Maximize network throughput**: A **cluster placement group** packs instances close together within a single Availability Zone, typically on the same underlying rack or set of racks. This physical proximity enables up to **100 Gbps** network bandwidth between instances (with supported instance types like C5n, P4d, etc.).

2. **Minimize network latency**: Because instances in a cluster placement group are physically co-located, the network hops between them are minimized, resulting in **single-digit microsecond latency** — the lowest achievable latency in AWS.

3. **Enhanced networking**: This uses SR-IOV (Single Root I/O Virtualization) to bypass the hypervisor's network stack, providing higher pa

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