Hello, according to your description, the answer is as follows:
1, if the wireless router has an output connection line, it needs to connect the computer interface to use wired Internet access.
2, some wireless router has no output connection line, only the incoming line no output line can connect to the computer, then only wireless Internet access function.
3, if the laptop can wireless Internet access, then if you change to wired Internet access, you must plug the optical fiber line connected to the router directly into the optical fiber connector of the laptop to achieve wired Internet access function.
Thank you for your question