A PCI is to give an internet connection and that also wireless. In order to attach wirelessly to an internet connection the user needs a wireless network adapter. These wireless network adapters are similar as what we name the wireless network cards more frequently. So therefore in the similar way a PCI network card or adapter gives a wireless working to the internet.
These network cards are called as the network adapters that have special antennas. These are receivable antennas that get signals. These antennas are made on the network card or interior and have the power to get or catch a signal that is given from the userís router. A PCI card is vraious from the USB adapters that provides internet connectivity that again is wireless. As both the kinds have differences, therefore, one require to know about them distinctly before one really makes a option to purchase