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DCSPEEDTEST BLOG

Internet guides, hardware reviews, latency optimization, and speedrun tips for the modern web.

What Is Jitter in a Speed Test? The Hidden Metric
Troubleshooting

What Is Jitter in a Speed Test? The Hidden Metric

What is network jitter: why high jitter causes stuttering, dropped packets, and rubberbanding, how to measure it in a speed test, and how to reduce it to zero.

By DCSpeedTest Research Team August 14, 2025 • 8 min read
Fix NordVPN Split Tunneling Not Working
Troubleshooting

Fix NordVPN Split Tunneling Not Working

A step-by-step diagnostic guide for resolving NordVPN split tunneling routing failures, correcting driver conflicts, and configuring app exclusion pathways.

By Dalto Cardoso August 12, 2025 • 9 min read
Upload Speed Suddenly Slow? 7 Real Fixes
Troubleshooting

Upload Speed Suddenly Slow? 7 Real Fixes

'Restart your router' only fixes 15% of cases. We ranked the real root causes of sudden upload slowdowns by success rate.

By Dalto Cardoso August 7, 2025 • 8 min read
Why Your WiFi Speed Test Keeps Fluctuating
Troubleshooting

Why Your WiFi Speed Test Keeps Fluctuating

Physical interference, radio spectrum saturation, and antenna limits explained — plus a 5-step checklist to stabilize results.

By Dalto Cardoso August 2, 2025 • 8 min read
Internet Slow at Night? 8 Fixes We Tested
Troubleshooting

Internet Slow at Night? 8 Fixes We Tested

If your internet crawls every evening between 7-11 PM, you're not alone. We tested 8 fixes, starting with the instant one.

By Dalto Cardoso July 9, 2025 • 9 min read
How to Fix a VPN That's Slowing Your Internet
Troubleshooting

How to Fix a VPN That's Slowing Your Internet

A step-by-step troubleshooting manual for restoring connection speeds, addressing MTU mismatches, cycling protocols to WireGuard, and optimizing DNS routing.

By Dalto Cardoso July 2, 2025 • 9 min read
Double NAT Troubleshooting: Fix Speed & Matchmaking
Troubleshooting

Double NAT Troubleshooting: Fix Speed & Matchmaking

Double NAT network troubleshooting guide: what Double NAT is, why it occurs, how to check for it, and the 3-step technical protocol to fix it.

By DCSpeedTest Research Team June 29, 2025 • 9 min read