What is the mechanism used by DNS servers to update each other by transferring the contents of their databases?

Match the following terms to their meanings:

I. A chart title A. the value or name of a data point II. An axis title B. a label that describes either the category axis or the value axis III. A data label C. a label that describes the chart IV. A gridline D. a line used to depict trends and forecast future data V. A trendline E. a line that extends from the horizontal or vertical axis through the plot area

In finding all possible subnet IDs for a network, what would be the magic number for subnetting network 192.168.0.0 using mask 255.255.224.0?

A) 16 B) 32 C) 64 D) 88