Installing an extra network card could be important to use as a backup network card on a server or desktop PC. Sometimes, a network card software driver or other software problem can make your internet not work or a server, or desktop.
In rare cases, you may need to connect your computer to two wired networks at once where having two wired ethernet ports maybe needed.
In rare cases, you may need to connect your computer to two wired networks at once where having two wired ethernet ports maybe needed.
