How many host addresses are available on the network 192.168.1.0 subnet 255.255.255.240 ?

6 is incorrect; it would be the usable hosts for 3 host bits (2^3 - 2), corresponding to a /29 subnet, not a /28.

8 would be the result of 2^3, which is the total number of addresses for a /29, but doesn't account for the network and broadcast addresses for a /28.

The subnet mask 255.255.255.240 indicates that the last octet has 4 host bits (240 in binary is 11110000). The number of usable host addresses is calculated as 2^H - 2, where H is the number of host bits. Therefore, 2^4 - 2 = 16 - 2 = 14 usable host addresses.

16 is the total number of addresses in the subnet (2^4), but it includes the network address and the broadcast address, which are not assignable to hosts.