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Using a VPN during an online test or interview can significantly affect network performance. If you see “High Latency” warnings, experience delayed audio or video, or notice a “VPN detected” message during system checks, it usually indicates that your connection is being rerouted or slowed down. This can interfere with real-time communication and may impact proctoring accuracy or session stability. In this article, you’ll understand why VPN usage causes latency issues and how to fix them before your session.

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🚨How does VPN impact latency?

A VPN encrypts internet traffic and routes it through external servers. While this improves privacy, it can introduce delays because:
  • Data travels a longer path between your device and the platform servers
  • Encryption and decryption add processing overhead
  • VPN servers may be congested or geographically distant
  • Some VPNs throttle speed on certain networks
These factors increase ping (latency) and can cause lag, audio delays, or video freezes during live sessions.

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✅ Common Causes and Fixes

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⚠️ Signs VPN-Related Latency Is Affecting Your Session

You may be impacted if:
  • Audio responses are delayed or cut off
  • Video freezes, skips, or appears out of sync
  • The system check shows High Latency or VPN Detected
  • Your session freezes or reconnects unexpectedly

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🌐 Final Check: Test Your Latency

Before rejoining your session:
  • Ensure VPN/Proxy is turned off
  • Run a Speed and Latency Test
  • Confirm:
    • Ping < 50 ms (ideal)
    • Jitter < 30 ms
    • Stable upload and download speeds
If results don’t meet the recommended thresholds, switch networks or retry after making the fixes above.

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📚 Related Articles

Still seeing “High Latency” or “VPN Detected” errors? Try these: