Computer Networks · Question 13 · Hard
How many usable host addresses does the network 10.0.0.0/21 provide?
- 2046
- 2048
- 1022
- 4094
Answer and explanation
Answer: A. 2046
Explanation: A /21 leaves 11 host bits, which gives 2^11 = 2048 addresses. Subtracting the network and broadcast addresses gives 2046 usable hosts.
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