easy Drill: egress bandwidth for live video
Drill
200,000 viewers watch a live event at 5 Mbps HD. Estimate egress bandwidth in GB/s. Watch the bits-vs-bytes trap.
✅ Worked solution & bounds check
Worked solution
- Total = 200,000 × 5 Mbps = 1,000,000 Mbps = 1 Tbps.
- ÷ 8 = ~125 GB/s egress.
Gate: a 25 Gbps NIC = ~3 GB/s, so this needs ~40+ edge nodes minimum ⇒ unambiguously a CDN problem. Also a cost flag: at ~$0.09/GB, an hour of this is ~$40K in egress alone.
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