SAP-C02 Q250 · Networking

Question

A company has a new application that needs to run on five Amazon EC2 instances in a single AWS Region. The application requires high-throughput, low-latency network connections between all of the EC2 instances where the application will run. There is no requirement for the application to be fault tolerant. Which solution will meet these requirements?

Accepted Answer

**Answer A: Cluster placement group + Enhanced networking** is correct because it satisfies every requirement:

1. **High-throughput, low-latency requirement**: A **cluster placement group** packs EC2 instances close together within a single Availability Zone, often on the same underlying rack or even the same physical network switch. This minimizes network hops and provides the lowest possible latency and highest possible throughput between instances.

2. **Enhanced networking requirement**: Enhanced networking uses **SR-IOV (Single Root I/O Virtualization)** to bypass the hypervisor's virtual network stack, providing higher bandwidth (up to 100 Gbps with ENA), lower latency, and lower jitter. Combined with a cluster placement group, this delivers the best possible network performance.

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