Wifi is a wireless networking technology with devices based on IEEE 802.11 So ,You do not need to stick any LAN Cable when you’re connected to wifi network .You Can access internet anywhere without any Ethernet Cable.
Here I will show you how to view wifi password in windows.
Step 1 . Type ncpa.cpl in run
Step 2. You will see Network Connection here
Step 3 . Right click on wifi network and Select Status then it will open in a window
Step 4. Click on wireless property and select security tab
Step 5. Click on show character Then you will be able to see the password here