1 One of the primary sources of fluoride exposure is not fluoridated drinking water but non-organic foods, due to the high amounts of fluoride-based pesticide residues on these foods. 2  Non-organic foods may account for as much as one-third of the average personâs fluoride exposure.esides food though, drinking water is certainly a primary source of fluoride exposure. Many mistakenly believe that bottled water is the answer, but this is a serious misconception. As a general rule, I don't recommend or encourage using bottled water on a regular basisâfor a number of reasons.
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A subnetwork, or subnet, is a logical, visible subdivision of an IP network. The practice of dividing a network into two or more networks is called subnetting. Computers that belong to a subnet are addressed with a common, identical, most-significant bit-group in their IP address.This results in the logical division of an IP address into two fields, a network or routing prefix and the rest field or host identifier.The rest field is an identifier for a specific host or network interface.or IPv4, a network is also characterized by its subnet mask, which is the bitmask that when applied by a bitwise AND operation to any IP address in the network, yields the routing prefix. Subnet masks are also expressed in dot-decimal notation like an address.