Computer Networks · Question 22 · Medium

What is the network address of the host 172.16.45.200/20?

  1. 172.16.45.0
  2. 172.16.40.0
  3. 172.16.0.0
  4. 172.16.32.0
Answer and explanation

Answer: D. 172.16.32.0

Explanation: A /20 mask is 255.255.240.0, so the third octet is in blocks of 16. 45 falls in the block 32-47, so the network address is 172.16.32.0.

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