Moore's Law As a rough rule of thumb, if the rate of growth of the table grows at a rate equal to, or less than Moore's Law, then the unit cost of storing the forwarding table should remain constant –Like all rough rules of thumb, there are many potential exceptions, and costs have many inputs as well as the raw cost of the the number of gates in a chip –Despite this, Moore's Law still a useful benchmark of a threshold of concern about routing growth
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