What is the maximum number of usable addresses in a subnet with a mask of 255.255.255.224?

What is the maximum number of usable addresses in a subnet with a mask of 255.255.255.224?

• A. 30 usable addresses
• B. 62 usable addresses
• C. 14 usable addresses
• D. 254 usable addresses

Answer: (A)

To determine the maximum number of usable addresses in a subnet with the mask of 255.255.255.224, begin by analyzing the subnet mask. The mask 255.255.255.224 corresponds to a /27 prefix length, which indicates that the first 27 bits of the address are used for the network part, while the remaining bits are used for host addresses. In this scenario, there are a total of 32 bits in an IPv4 address. With a /27 mask, you have 32 - 27 = 5 bits left for host addresses in the subnet. The number of possible addresses that can be created with these 5 bits is calculated as 2^5, which equals 32. However, in any subnet, 2 addresses are reserved: one for the network address (the first address in the range) and one for the broadcast address (the last address in the range). Thus, to find the maximum usable addresses, you subtract these 2 reserved addresses from the total count: 32 (total addresses) - 2 (reserved addresses) = 30 usable addresses. This result confirms that a subnet with a mask of 255.255.255.224 can indeed support a maximum

To determine the maximum number of usable addresses in a subnet with the mask of 255.255.255.224, begin by analyzing the subnet mask. The mask 255.255.255.224 corresponds to a /27 prefix length, which indicates that the first 27 bits of the address are used for the network part, while the remaining bits are used for host addresses.

In this scenario, there are a total of 32 bits in an IPv4 address. With a /27 mask, you have 32 - 27 = 5 bits left for host addresses in the subnet. The number of possible addresses that can be created with these 5 bits is calculated as 2^5, which equals 32. However, in any subnet, 2 addresses are reserved: one for the network address (the first address in the range) and one for the broadcast address (the last address in the range).

Thus, to find the maximum usable addresses, you subtract these 2 reserved addresses from the total count:

32 (total addresses) - 2 (reserved addresses) = 30 usable addresses.

This result confirms that a subnet with a mask of 255.255.255.224 can indeed support a maximum