Answer:
Explanation:
To determine how many usable IP addresses are available in the subnet defined by the subnet mask 255.255.255.240 (or /28 in CIDR notation), we need to understand how subnetting works.
The subnet mask 255.255.255.240 in binary is:
\[ 11111111.11111111.11111111.11110000 \]
This mask leaves 4 bits for host addresses (since it is a /28 subnet). The number of usable IP addresses in a subnet is always \( 2^{\text{number of host bits}} - 2 \).
- The formula subtracts 2 because the first address in the subnet is reserved as the network address, and the last address is typically reserved as the broadcast address.
In this case:
\[ 2^4 - 2 = 16 - 2 = 14 \]
Therefore, there are \( \boxed{14} \) usable IP addresses in the subnet 255.255.255.240.