What Is a Committed Data Rate (CDR)?
A Committed Data Rate (CDR) is the minimum bandwidth that your network provider guarantees will always be available to you. It’s a contractual commitment — like reserving a dedicated lane on a motorway for your traffic, no matter how busy it gets.
For example, if your CDR is 100 Mbps, you are guaranteed that speed 24/7, regardless of network congestion.
Why CDR Matters
- Predictable performance – ideal for VoIP, video conferencing, and mission-critical apps
- Guaranteed throughput – ensures your services don’t slow down during peak hours
- SLAs (Service Level Agreements) – often tied to CDR for uptime and latency guarantees
CDR is especially important in IP transit, leased lines, and dedicated hosting environments.
CDR vs Burstable Bandwidth
Many providers offer a CDR plus additional burstable bandwidth — allowing you to exceed your committed rate temporarily. This is often billed using the 95th percentile method, where your top 5% of usage is excluded from billing.
- CDR: Always available, fixed cost
- Bursts: Temporary spikes, billed separately
Want to know how CDR applies to your Fast2host service? Contact our team for a tailored bandwidth plan.