Appendix D. Solutions to Selected Exercises
Calculate the maximum number of class A, B, and C network IDs.
The value is 27 – 2 (126) plus 214 - 2 (16,382) plus 221 – 2 (2,097,150) for a total of 2,113,658. We subtract 2 in each calculation since a network ID of all zero bits or all one bits is invalid.
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