AWS Certified SysOps Administrator – AssociateNetworking and Content DeliveryMedium
A SysOps administrator is configuring a new web application that requires very low latency and high packet per second (PPS) performance for network traffic between EC2 instances. The application performs intensive in-memory caching and real-time analytics. Which EC2 networking feature should the administrator ensure is enabled and configured to meet these demanding performance requirements?
- AEnhanced Networking with Elastic Network Adapter (ENA)
- BVPC Flow Logs
- CJumbo Frames
- DPlacement Groups
Show answer & explanationAnswer & explanation
Correct answer: A. Enhanced Networking with Elastic Network Adapter (ENA)
Enhanced Networking, powered by Elastic Network Adapter (ENA), provides significantly higher packet per second (PPS) performance, lower network jitter, and lower latency. This is crucial for applications demanding high network throughput and low latency.
Why the other options are wrong
- B. VPC Flow Logs are for capturing network traffic information, not for improving network performance.
- C. Jumbo Frames allow larger packet sizes but do not inherently guarantee low latency or high PPS performance on their own; they can improve efficiency but are not the primary feature for high PPS/low latency.
- D. Placement Groups (specifically Cluster Placement Groups) can help with low latency between instances, but Enhanced Networking (ENA) is the underlying network feature that provides the fundamental high PPS and low latency capabilities.
EC2 Enhanced Networking (ENA)
A feature that uses single root I/O virtualization (SR-IOV) to provide high-performance networking capabilities on supported EC2 instance types.
- Significantly higher packet per second (PPS) performance
- Lower network latency
- Lower network jitter
- Enabled by Elastic Network Adapter (ENA) or Intel 82599 Virtual Function (VF) interface
Memory trick: ENA is Enhanced Networking, Always Fast.