14.15.10.90/15 --255.254.0.0 14.28.10.165
255.1111110.0.0
endereço de rede: | rede 10.28.0.0
14.00001111.0.0
14.14.0.0
msacara de rede:
255.254.0.0
endereço de broadcast? |broadcast 14.29.255.255
14.15.255.255
14.00001111.255.255