Which two hosts are part of subnet 172.16.160.0/20? (Choose two.)

Question

Options

• A172.16.168.0
• B172.16.176.1
• C172.16.160.255
• D172.16.160.0
• E172.16.176.255

• A
  83% (20)
• B
  13% (3)
• E
  4% (1)

Explanation

A /20 prefix means the subnet mask is 255.255.240.0. With 172.16.160.0/20, the valid host range spans from 172.16.160.1 to 172.16.175.254, with the network address at 172.16.160.0 and the broadcast at 172.16.175.255. The key is the third octet: 160 in binary is 10100000; with /20, the top 4 bits (1010) are fixed, giving a third-octet range of 160–175. Checking each option: A (172.16.168.0) - third octet 168 is within 160–175, so it is in the subnet. B (172.16.176.1) - third octet 176 is outside the range (176 > 175), not in the subnet. C (172.16.160.255) - third octet 160 is the start of the range, and the host byte .255 is within the valid host space (broadcast is 172.16.175.255), so it is in the subnet. D (172.16.160.0) - this is the network address itself, not a valid host. E (172.16.176.255) - third octet 176 is out of range.

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