Consider a classless IP address 173.91.43.43/25. The number of IP addresses, first IP address, and the last IP address in 173.91.43.43/25 are ___ respectively?
1
128, 173.91.43.0 and 173.91.43.63
2
128, 173.91.43.0 and 173.91.43.127
3
126, 173.91.43.0 and 173.91.43.127
4
128, 173.91.43.1 and 173.91.43.63