Wireless IP cameras can be used whenever you can’t wire the camera to your network switch. Cameras with built in wireless radios are used indoors, while cameras with external radios are used outdoors and in remote locations.
Cameras with built in radios are usually for indoor home use. But when it comes to outdoor use, cameras that use external radios are preferred because they are reliable and can cover much longer distances.
There are two types of wireless connections; Wi-Fi radios that use a dedicated connection between two points, and 3G / 4G that use the telephone wireless network.
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