Why does rebooting network router greatly improves wired network speed?

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My router is on appliance timer to shut off and turn back on at about 3 AM because long ago I found rebooting it keeps it running at optimal speed. I did a test: file transfer between 2 computers on my home network averaged 10mbit/sec before restarting and can reach 100 (both computer’s max speed) after restarting.

I tried Googling but they all refer to wifi even when I searched for wired network -wifi (I guess Google is sometimes stupid about understanding my search query)

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Anonymous 0 Comments

10 mbps sounds like a suspiciously round number to me, and it’s exactly equal to the oldest Ethernet standard compatible with modern hardware. So my hypothesis is the connection starts out at 100mbps, then it changes to 10mbps in response to noise. I suspect it’s most likely an issue with the cables:

– How long are the cables?
– Are the cables over 20 years old? You need CAT-5 or CAT-6 cables, and these cables weren’t everywhere until 2000-2005 or so.
– Are the cables damaged in any way?
– Are there any major sources of electronic noise nearby?

(It’s not outside the realm of possibility that it could be a different problem, e.g. one machine’s network hardware, the router itself, or even a software problem. But I’d check the cables first.)

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