About this tag
The network cables tag on WindowsForum.com collects practical troubleshooting discussion about Ethernet cabling as a cause of Windows networking problems. A recurring theme is link speed: a Windows 11 PC or NAS that suddenly negotiates 100 Mbps instead of gigabit, or drops connections intermittently, often traces back to a bad, damaged, or flat Ethernet cable rather than drivers or switch configuration. The advice across these threads is consistent: check the physical layer first, inspect patch cables and uplinks, and confirm negotiated link speed before reinstalling NIC drivers or rebooting switches.
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    Windows 11 Ethernet Drops to 100 Mbps? Diagnose Bad Cables, Flat Runs and Link Speed

    If you've ever spent a weekend reinstalling NIC drivers, rebooting switches and questioning your NAS, here's a less glamorous suspect: the cable. A new first-person account from XDA Developers describes a home network with intermittent slowdowns and dropouts that were hard to pin down. The...
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