The card is also been required by each machine which is being used to setup in a wireless network. A laptop generally has an extension (PCMCIA) slot where the network card would easily fit in to it. If using a desktop computer then you will require an internal card which will generally have a small aerial or an external antenna on it. These aerial are being voluntary for the most of the tools and they can also help in increasing the signal on the card.

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Other than this you would clearly need a desktop computer or laptop to which this hardware would be easily connected to it.