Question : wireless connection question

Equipment: NetGear Wireless Router and Zoom Cable Modem.  
Ethernet cable connected between laptop and one of the four  LAN ports of the router.
Ethernet cable  connected between modem and Internet port of  router.

The software for the netgear router was installed on the laptop.
At issue:  If I remove the ethernet cable from the laptop, I'm still able to connect to the laptop.  Why?  I'm not following how I'm able to surf when one end of the cable between laptop and router is removed

Answer : wireless connection question

Either:

1-  "NetGear Wireless" You are are using the wireless signal, not unintentionally.

2- You get randomly conneted to one of your neighbours wireless signals, unintentionally.