When deploying online exams, network infrastructure often becomes the silent determinant of success or failure. Even with a powerful backend system, users with weak or unstable connectivity will face lag, timeouts, or disconnections. At Addmen, we emphasize that true exam reliability requires both a robust system and an optimal connectivity strategy.
This page explains the crucial network & connectivity factors that impact online exam performance, along with actionable recommendations for institutions and students alike.
1. Server Data-Transfer Bandwidth
We provide a default server bandwidth tier that supports about 25 simultaneous users. For higher concurrency (e.g. 50 or 100 concurrent users), bandwidth must scale exponentially.
Institutions often prefer a balanced plan rather than overpaying for seldom-used peak capacity.
2. User Internet Connection Speed & Quality
Even if the server is high‑spec, your exam’s user experience will be limited by the lowest bandwidth link along the path.
If a student’s internet is slow or inconsistent, page loads will lag, and answer submissions may drift.
3. Consistent Connectivity (Stability Matters)
Online exams continuously send and fetch small data packets — such as saving answers every few seconds. If the internet drops briefly, it can interrupt sessions or cause logouts.
A steady 1 Mbps connection without interruptions can outperform an unstable 2-Mbps link.
| Use Scenario | Minimum Requirement | Recommended / Optimal | Notes |
| Single User – Browser | Basic dial-up / minimal broadband | Stable broadband | Works, but slow and vulnerable to drops |
| Single User – Mobile App | 2G (for downloads) | 3G or higher | Uploading at start/end is critical; app works offline mid-test |
| Multiple Users in Test Lab | Depends on user count | e.g. 8-Mbps for 50 users, 10+-Mbps for 100 users | Local lab server is ideal to reduce internet dependency |
For high concurrency exams, local lab servers offer better predictability by minimizing external internet load.
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