Internet Diagnostics & VPN Readiness
NDT7 single-stream + optional multi-stream peak. Includes loaded latency, VPN grading, use-case readiness, ISP contacts, and exportable logs. October 2025
1) Single-Stream Diagnostic (NDT7)
Idle
MethodNDT7 single-stream
This mirrors speed.measurementlab.net methodology. For best fidelity: wired Ethernet, VPN off, pause sync tools, close heavy tabs.
Core Results
Download
Throughput (single-stream)
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Loaded latency (p90)
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Jitter (p90−p10)
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Upload
Throughput (single-stream)
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Loaded latency (p90)
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Jitter (p90−p10)
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Unloaded Baseline
Idle RTT (probe)
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Bufferbloat (DL)
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Bufferbloat (UL)
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Excellent
Watch
Problem
2) Multi-Stream Peak (Parallel HTTP)
Idle
Streams
Object
Configure your CDN base URL below. This test uses parallel Range GETs with moving-window throughput, similar to consumer “peak” tests.
Peak Throughput (multi-stream)
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Sustained (last 5 s)
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Bytes transferred
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Duration
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Expected objects at: {base}/obj_16.bin, obj_64.bin, obj_256.bin, obj_1024.bin. Required headers:
Access-Control-Allow-Origin: *, Accept-Ranges: bytes, Cache-Control: public, max-age=31536000, immutable.
VPN Performance
Estimated VPN throughput
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Grade
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Run tests to populate.
Use-Case Performance
| Scenario | Recommended | Based on your results |
|---|---|---|
| 4K Streaming | ≥50 Mbps down, bloat <50 ms | — |
| HD Video Calls | ≥10 Mbps up/down, bloat <30 ms | — |
| Online Gaming | Idle RTT <40 ms, bloat <20 ms | — |
| Cloud Gaming | ≥100 Mbps down, idle <30 ms | — |
| Large File Transfers | ≥300 Mbps up/down | — |
| Remote Work / VDI | ≥25 Mbps down, bloat <40 ms | — |
Transfer time at 1 Gbps (ideal): 10 MB ≈ 0.1 s, 25 MB ≈ 0.2 s, 50 MB ≈ 0.4 s. Real paths add protocol / queueing overhead.
Findings & Guided Fixes
- Run a test to generate prioritized recommendations.