There are many reasons for this problem; one of the reasons is that Windows Update failed to install or update the Network drivers, in that case, you have to update the required driver manually.

The sysadmin's guide to repurposing an RJ45 port ...

Remote Desktop Protocol (RDP) allows you to access your computer over a network, but connecting from outside your local network (over the internet) introduces additional challenges. If you can connect ...

Ethernet ports are usually just relegated to connecting computers to routers to facilitate an internet connection, but ...