How many valid host addresses are available on an IPv4 subnet that is configured with a /25 mask?
a. 254
b. 126
c. 62
d. 30
When a /25 mask is used, 6 bits are used as host bits. With 6 bits, 64 addresses are possible, but one address is for the subnet number and one address is for a broadcast. This leaves 62 addresses that can be assigned to network devices.
Answer=C
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