Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.)
A.
10.1.168.0
B.
10.1.176.1
C.
10.1.174.255
D.
10.1.160.255
E.
10.1.160.0
F.
10.1.175.255
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2 to the twelfth power (32-20=12), is 16x(2 to the eighth), which means the range is 160.0 through 175.255. Valid host addresses are 10.1.160.1 through 10.1.175.254.
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From the /20 we can find all information we need:
Increment: 16 (/20 = 11111111.11111111.11110000.00000000). This is applied for the 3rd octet.
Network address: 10.1.160.0 (because 160 = 16 * 10 and 160 = 160 -> the IP address above is also the network address.
Broadcast address: 10.1.175.255 (because 175 = 160 + 16 – 1)
Therefore only 10.1.168.0, 10.1.174.255 and 10.1.160.255 are in this range. Please notice 10.1.174.255 is not a broadcast address and can be assigned to host.
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0
From the /20 we can find all information we need:
Increment: 16 (/20 = 11111111.11111111.11110000.00000000). This is applied for the 3rd octet.
Network address: 10.1.160.0 (because 160 = 16 * 10 and 160 = 160 -> the IP address above is also the network address.
Broadcast address: 10.1.175.255 (because 175 = 160 + 16 – 1)
Therefore only 10.1.168.0, 10.1.174.255 and 10.1.160.255 are in this range. Please notice 10.1.174.255 is not a broadcast address and can be assigned to host.
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