With a subnet mask of 255.255.255.248, how many usable IP addresses are available?

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Multiple Choice

With a subnet mask of 255.255.255.248, how many usable IP addresses are available?

Explanation:
A /29 subnet (255.255.255.248) provides 2^(32-29) = 8 total IP addresses. In IPv4 subnets, the first address is the network address and the last is the broadcast address, leaving 8 - 2 = 6 usable addresses for devices. So, there are six usable IP addresses. The other numbers correspond to different subnet sizes: a /28 would give 14 usable (16 total minus 2), a /30 would give 2 usable (4 total minus 2), and the 8 refers to the total addresses in this /29 subnet, not the usable ones.

A /29 subnet (255.255.255.248) provides 2^(32-29) = 8 total IP addresses. In IPv4 subnets, the first address is the network address and the last is the broadcast address, leaving 8 - 2 = 6 usable addresses for devices. So, there are six usable IP addresses. The other numbers correspond to different subnet sizes: a /28 would give 14 usable (16 total minus 2), a /30 would give 2 usable (4 total minus 2), and the 8 refers to the total addresses in this /29 subnet, not the usable ones.

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