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fiber optic Internet, Modem router network hub . cable connected router. internet connection, data, speed test concept. ethernet cables plugged close Stock Photo - Alamy
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Fiber Optic Internet. Network Cables Connected To a Router, Speed Test Concept. Wireless Internet Router with Connected Cables. Stock Photo - Image of internet, electric: 193355738
![An Internet or LAN port isn't working correctly on my router. How do I perform a loopback test to check the port? | Answer | NETGEAR Support An Internet or LAN port isn't working correctly on my router. How do I perform a loopback test to check the port? | Answer | NETGEAR Support](https://www.downloads.netgear.com/files/answer_media/DITAToo/Knowledge%20Base%20Articles%20%28New%29/CHP%20Products/Routers/RAX20_loopback_test_front.png)