Select manage known networks option on the right section Click on Add a new network option. A separate window will pop up. There, fill in network profile details (network name, security key, etc.).

Occasionally, your computer may show up on the network with a "(2)" or other number in parentheses after its name. In some cases, it will appear this way in the sidebar of your computer's Finder ...

With the release of the Windows 10 October 2018 Update, Microsoft quietly added a new network diagnostic and packet monitoring program called C:\Windows\system32\pktmon.exe.