Current network technology has grown rapidly. Various technologies have been developed to assist humans in communicating. If we remember the era of 80-year, computer networking technologies rely on cable based network technologies, but currently the technology started many left because of some limitations, such as the costs which must be issued by the company when using this technology (wired network), besides that this technology is also not flexible because it is very dependent on the cable. You can imagine how many millions of feet of cable will be used to transmit data from one island to another island. It is a waste of time and inefficient.
Currently, if we consider as companies begin implementing wireless technology (wireless) or commonly called the Wireless Fidelity (Wi-Fi). This we can see there are many companies now that offer hotspot areas (areas that have Wi-Fi based Internet network) which can be accessed by everyone whether for free or by way of registration to the service provider.
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