CLASS-FULL SUBNETTING IN CLASS A

Which subnet does host 10.56.243.28/20 belong to?

128 64 32 16 8 4 2 1         255.255.240.0

x.x.1111|0000.00000000

NETID          RANGE                  BROADCAST
10.56.240.0    240.1-255.254         10.56.255.255



What is the last valid host on the subnetwork 10.220.0.0 255.255.240.0?

128 64 32 16 8 4 2 1

X.X.1111|0000.0000000

NETID        RANGE             BROADCAST
X.X.0.0     0.1-15.254        X.X.15.255
X.X.16.0
32
48
64
80
96
112
128
144
160
176
192
208
224
240


What valid range does the host 10.181.20.152 255.224.0.0 belong to?

128 64 32 16 8 4 2 1

X.111|00000.00000000.00000000

NETID          RANGE                             BROADCAST
X.160.0.0   160.0.1-191.255.254                 X.191.255.255        

X.192.0.0







What is the broadcast address of the network 10.100.208.0 255.255.240.0?


128 64 32 16 8 4 2 1

X.X.1111|0000.00000000

NETID                       BROADCAST
10.100.208.0               10.100.223.255