How packet loss feels in real life
- Broken or robotic voice calls
- Video freezing or buffering
- Characters teleporting in online games
- Slow or failed loading in cloud apps
Packet Loss Guide
What is packet loss in a speed test?
Packet loss happens when some data never reaches its destination. Even small amounts of packet loss can make a connection feel unreliable, especially for calls, gaming, and live streams.
0% packet loss
The ideal result. Data is arriving consistently without being dropped.
Low packet loss
May still create occasional stutter, delayed voice, or game lag spikes.
High packet loss
Can cause severe instability, frozen calls, buffering, missing audio, and dropped online sessions.
What causes packet loss?
Wi-Fi interference
Weak signal, overlapping channels, and distance from the router can all contribute.
Network congestion
Busy local traffic or overloaded ISP routes can lead to dropped packets.
Router or modem issues
Faulty, outdated, or overloaded hardware can create instability even at home.
Server-side problems
The issue may be outside your home network if only specific services or regions are affected.
How to troubleshoot packet loss
- Test again closer to the router
- Restart network hardware
- Try a different Wi-Fi band or wired connection
- Repeat tests across different times and servers
- Check whether the issue is limited to one app or service
Why packet loss can feel worse than a slow connection
Slow bandwidth usually means things take longer. Packet loss is different because parts of the data never arrive at all. That can create freezing, repeated retries, robotic voice, or sudden skips that feel more broken than simple slowness.
This is why packet loss matters so much for calls, gaming, cloud apps, and live streams. Real-time services depend on consistent delivery, so missing packets often show up immediately in the user experience.
How to tell if packet loss is local
- The issue improves a lot near the router
- Only Wi-Fi devices show the problem
- Restarting your router changes the result
- Ethernet performs much better than Wi-Fi
How to tell if packet loss may be upstream
- Multiple devices show similar loss
- Loss appears at specific times of day
- Only certain regions or services are affected
- Ethernet still shows repeated packet loss
FAQ about packet loss
Is any packet loss bad?
For real-time apps, even small loss can matter. The worse the symptoms, the more seriously you should treat non-zero packet loss.
Can packet loss happen on a fast connection?
Yes. High Mbps does not prevent dropped packets if the connection is unstable or congested.
Should I compare jitter too?
Yes. Jitter explains unstable timing, while packet loss explains missing data. Together they give a clearer diagnosis.
Measure packet loss with LizSpeedTest
LizSpeedTest measures packet loss together with ping, jitter, and bandwidth so you can tell whether a bad connection is unstable, overloaded, or simply slow.