How many class A, B and C network IDs can exist ?
Correct answer: D. 2113658
- A. 128
- B. 126
- C. 16382
- D. 2113658
Explanation
Using the traditional classful-addressing convention, the usable network-ID counts are 126 for Class A, 16,382 for Class B, and 2,097,150 for Class C. Their sum is 2,113,658, with the reserved all-zero and all-one network IDs excluded.
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