Answer:- The hietatchical aspect of the Ip addresses:network -host parts of the address.This allows routers to \'route\' network address only. IP addresses include the network/subnet, so that interfaces on different networks must have different network portions of the address.Alternatively ,addresses include location information and different interfaces are at different locations , topologically. All host attached to the same network have the same network part of their IP address.The host part identifies that host uniquely on the network point-to-point interfaces can be assigned a duplicate address because the other endpoint of the lint doesnt use the address to reach the interface ;it just sends .Such interfaces ,however ,cannot be addressed by any other host in the network. Solution Answer:- The hietatchical aspect of the Ip addresses:network -host parts of the address.This allows routers to \'route\' network address only. IP addresses include the network/subnet, so that interfaces on different networks must have different network portions of the address.Alternatively ,addresses include location information and different interfaces are at different locations , topologically. All host attached to the same network have the same network part of their IP address.The host part identifies that host uniquely on the network point-to-point interfaces can be assigned a duplicate address because the other endpoint of the lint doesnt use the address to reach the interface ;it just sends .Such interfaces ,however ,cannot be addressed by any other host in the network..