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The secure communication link is a virtual private network communication link over the computer network in which one or more data values that vary according to a pseudo-random sequence are inserted into each data packet.
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Connectivity to the outside world: There is only WiFi and Bluetooth with no LTE, 3G, or 4G access to any network unless you link through your phone or portable hotspot, which means running down two batteries at the same time and jeopardizing your ability to make and receive phone calls.
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As long as BT controls the "local loop", the last link from the network to a phone or modem, and insists on metered access, it hardly pays to offer unmetered web deals.
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