I've just bought an usb-lan adapter. it is usb 2.0 and 10/100Mb
it connects in full duplex at 100Mb but it is really slow: it goes 10Mb
Compared with embedded NIC same file transfert goes ~100Mb
Is it normal?
As a possibility - the USB device may be 10/100 and connecting at 100 which is the speed of its connection to the wire, and it may be USB 2.0 compliant, but - what is the speed of the actual port you are connecting it to? USB 1.1 ports are limited to 12Mb.
I resolved thanks to UsbView software.
Despite it is marked as usb 2 lan adatper. It is an usb 1.1 adapter