What is packet loss?
Packet loss happens when small pieces of internet traffic fail to reach their destination. A connection can show a good download speed but still feel unstable if packets are being dropped.
It is especially noticeable in online games, video calls, voice chat, livestreams and remote working tools because those services need a steady stream of data.
How to test for packet loss
Start with a normal LinkSpeed test and look at ping and jitter. Very high jitter or sudden spikes can be a clue that packets are being delayed or dropped.
- Run a speed test close to the router.
- Repeat over Ethernet if possible.
- Run another test in the room where you normally have problems.
- Compare ping and jitter, not just download speed.
Common causes
- Weak Wi-Fi signal or interference.
- Router overload from too many devices.
- Large uploads or cloud backups saturating the connection.
- Damaged Ethernet cables or poor powerline adapters.
- ISP congestion or a local line fault.
How to reduce packet loss
Use Ethernet for gaming or video calls where possible, move closer to the router, restart the router, pause large uploads, and test again at different times of day.
If packet loss still appears on a wired connection, record your results and contact your broadband provider.