Packet Loss

What is packet loss?

When you send data over a network, it gets broken into small chunks called "packets." Packet loss happens when some of these packets don't make it to their destination. They simply disappear somewhere along the way.

Think of it like sending a 10-page document through the mail but only 9 pages arrive. The missing page might have gotten lost at the post office, fallen out of the envelope, or been delivered to the wrong address.

Why it matters

For web browsing and file downloads, packet loss causes slowdowns because lost packets need to be re-sent. Your browser waits for the missing pieces before showing the page.

For video calls and voice chat, packet loss is more serious. There's no time to re-send missing data, so you hear audio cutting out, voices getting choppy, or video freezing momentarily. Even a small amount of packet loss can make a call frustrating.

What you can do

Quick fixes:

• Switch from WiFi to a wired Ethernet connection—WiFi is the most common cause of packet loss
• Move closer to your WiFi router if wireless is your only option
• Restart your router—sometimes it just needs a fresh start
• Check for interference sources nearby (microwaves, baby monitors, cordless phones)

If problems persist:

• Check your Ethernet cables for damage—a bad cable can cause packet loss
• Try a different Ethernet port on your router
• If you've had the same router for many years, it might be time for a replacement
• Contact your ISP if packet loss happens even with a wired connection—the problem may be on their end

What Network Weather shows you

Network Weather tracks packet loss as a percentage of data that doesn't arrive.