How to Test Internet Speed with i-Speed by VNNIC

i-Speed is VNNIC’s neutral platform for measuring Internet access speed in Vietnam. It is available through the i-Speed app and the official web test. A result includes download speed, upload speed, latency, and jitter, but a single test should be treated as a snapshot rather than a complete judgment of your Internet plan.

You can use the official i-Speed website or the mobile app linked by VNNIC. The current VNNIC service page identifies the platform as a collaboration between the Viet Nam Internet Network Information Center and the Telecommunications Authority.

Measure Internet speed with i-Speed

1. Start a measurement

Open i-Speed and follow the app’s permission prompts. Location access may be requested to associate the measurement with an area; review the permission and your device settings before allowing it. Select Perform measurement to test the current connection.

2. Choose a measurement point when needed

The selected server affects the route and latency recorded by a speed test. To compare another available point, choose Change measurement point from the current network or server area, then select a nearby option. Use the same point when comparing tests taken at different times.

Understand the i-Speed results

• Download speed: how quickly the device receives data during the test, usually shown in megabits per second (Mbps). It affects activities such as streaming and downloading large files.
• Upload speed: how quickly the device sends data, also usually shown in Mbps. It matters for cloud backups, sending large files, live streaming, and video calls.
• Ping or latency: the round-trip delay between the device and the selected measurement point, generally shown in milliseconds (ms). Lower latency usually supports more responsive calls, games, and remote sessions.
• Jitter: variation between latency measurements. Large fluctuations can make real-time audio or video feel uneven even when average speed looks adequate.

Throughput and latency measure different aspects of a connection. A high download result does not guarantee low delay, and Wi-Fi conditions can affect the device’s result even when the Internet line itself is working normally.

Run a fair comparison

1. Pause large downloads, cloud backups, and streaming on other devices.
2. For a Wi-Fi test, stay in the same place and use the same Wi-Fi band each time.
3. For a line-speed check, use a wired Ethernet connection when practical.
4. Run several tests at different times and record the server, connection type, and device.
5. Compare results with the speed and conditions stated in your service plan, not only with another household’s result.

If only one device is slow, investigate that device or its Wi-Fi connection first. If repeated wired tests are consistently poor, save the results and contact the Internet provider with the test times and setup details.

Other ways to investigate a slow connection

The TipsMake network utility hub includes browser-based speed, ping, jitter, and related diagnostic tools. To isolate delay or reachability problems from raw throughput, see how to check a network connection with ping.