Gigabit network cards are commonly available in virtually all computer and IT stores. There are many online sources like Amazon for example, who offer such network cards. Alternatively, most specialised local IT stores can provide you with gigabit equipment.

gigabit fidelity

A gigabit hub is used to store and protect information and files through copying and safe keeping. A gigabit hub plugs into the computer and works through that.

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If you have gigabit network cards in your PC the internal network will be faster.