Using Ethernet Network Adapter as USB port for OpenWrt

for any router which do not have usb port,
I was curious to know if USB Ethernet Network Adapter can be used as USB port to connect any usb device to router?

No, adapters like the one you linked are designed to add Ethernet to a device with USB ports. You can't use them to add USB to a device with Ethernet ports.

The inverse function is called "USB-over-IP". You can buy products that serve this specific purpose, but a cheaper and more flexible solution is to use a Raspberry Pi or any other single-board computer (SBC) with both USB and Ethernet ports. Then depending on what USB device you need to add, you run some specific service on the SBC to access it over the network. For example:

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have you ever seen an adapter with an USB female port and an Ethernet male connector ?

check if you find a cheap Seagate Dockstar, or Pogo Plug (preferably a v4) somwehere.

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I found real lot of things for usb port interoperability but dont know limitations as explained by @elbertmai

You have to plug the USB Type-C "pigtail" into a USB Type-C device like a laptop or a phone. These don't add USB to Ethernet-only devices either. You use this to add Ethernet, HDMI, battery charging, and more USB ports to a USB Type-C device that supports those functions.

yes, but the USB flash drive data connected to one of the USB ports have to go via the host to leave through the ethernet port ...

if you plug in a RJ45 cable, and a flash drive alone, nothing will happen, even if you'd provide the power via the USB-C cable.

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