Computer Networks · Question 6 · Medium

How many usable host addresses are available in a single subnet with the mask /26?

  1. 64
  2. 62
  3. 30
  4. 126
Answer and explanation

Answer: B. 62

Explanation: A /26 leaves 32 - 26 = 6 host bits, which gives 2^6 = 64 addresses. Removing the network and broadcast addresses leaves 62 usable hosts.

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