ethernet functionality not enabled socket error#10065 No route to host.

When you encounter an Ethernet functionality not enabled error with a socket error code 10065 "No route to host" while attempting to send or receive data over a network, it typically indicates two issues:

1. **Ethernet Functionality Not Enabled**: This error might be related to your system's network configuration. It suggests that either your operating system does not have Ethernet support enabled or there could be hardware issues with your network interface card (NIC). You can check if the Ethernet adapter is recognized and functioning correctly by running `ifconfig` or `ip addr` on Linux, or `getifstatus` on macOS.

   ifconfig

2. **No Route to Host**: The second error message means that your computer cannot find a valid route to the destination host when trying to establish a connection. This can happen if there is no default gateway configured or if there's a temporary issue with network routing tables. Check your routing table with commands like `route` on Linux or `route print` on Windows, and ensure you have at least one default route pointing to a reachable gateway.

   route -n

To resolve this issue, try these steps:

1. Make sure your Ethernet cable is connected properly.
2. Restart your networking services: On Linux, use `sudo service networking restart` or `sudo systemctl restart networking.service`.
3. Verify that your NIC is working by enabling and disabling it using `ethtool` (Linux) or checking the Network Control Panel (Windows).
4. Configure your default gateway in your router settings or system's network configuration.
5. Update your network driver or firmware if necessary.
6. Check for any firewalls or security software blocking the connection.

If none of these steps work, it might be beneficial to seek further assistance from your IT department or consult relevant documentation for your specific environment.