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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

What Might Be WrongWhat You Can Do
VPN or proxy is enabledDisable VPN or proxy settings from your device or browser.
High network latency (ping >150ms)Restart your modem/router. Switch to a wired (LAN) connection if possible.
Using a distant VPN serverDisconnect from the VPN or choose a server closer to your actual location.
Network is overloaded (home or office)Pause large downloads, streaming apps, and cloud sync services during your session.
You’re on a school/office firewallContact your IT team to whitelist Talview domains and ensure no proxy restrictions are applied.
Using a mobile hotspot or metered networkSwitch to a stable broadband connection for smoother performance.
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. Still seeing “High Latency” or “VPN Detected” errors? Try these: