AWS Direct Connect
AWS Direct Connect is a dedicated, private network link between your on‑premises infrastructure and AWS, giving you lower latency, more consistent performance, and higher security than typical internet-based connections. It’s widely used for hybrid cloud setups, large data transfers, and latency‑sensitive workloads.
What AWS Direct Connect Actually Does
- Creates a physical, fiber‑optic Ethernet connection between your router and an AWS Direct Connect location.
- Lets you build virtual interfaces (VIFs) to:
- Public AWS services (e.g., S3)
- Your Amazon VPC (private VIF)
- Bypasses the public internet, routing traffic over the AWS global backbone.
- Provides predictable latency, stable bandwidth, and potentially lower data transfer costs.
Why Companies Use It
🔒 1. Security & Reliability
Traffic stays on private links and the AWS backbone, reducing exposure to internet-based threats.
⚡ 2. Performance
- More consistent latency
- Fewer network hops
- Better throughput for large data transfers
💸 3. Cost Optimization
Outbound data transfer via Direct Connect is often cheaper than standard AWS internet egress.
How It Works (Simplified)
- You order a dedicated connection (1 Gbps, 10 Gbps, 100 Gbps) or use a hosted connection from a partner.
- Your router connects to an AWS Direct Connect router at a Direct Connect location.
- You configure:
- Public VIF → Access AWS public services
- Private VIF → Connect to your VPC
- Traffic flows over private links → AWS backbone → your AWS resources.
Direct Connect vs. VPN (Quick Comparison)
| Feature | Direct Connect | Site‑to‑Site VPN |
|---|---|---|
| Connection Type | Private, dedicated fiber | Over public internet |
| Latency | Predictable, low | Variable |
| Bandwidth | High (1–100 Gbps) | Limited by internet |
| Encryption | Optional (MACsec, IPsec) | Encrypted (IPsec) |
| Cost | Higher setup, lower egress | Lower setup, higher variability |
Common Use Cases
- Hybrid cloud architectures
- Real‑time financial or trading systems
- Large-scale data migrations
- High-throughput analytics pipelines
- Consistent connectivity for enterprise workloads
Direct Connect Locations
AWS has many global Direct Connect locations; each provides access to the AWS Region it’s associated with. You can even use one connection to reach multiple Regions (except China).