If a host on a network has the address 172.16.45.30/30, what is the subnetwork this host belongs to? * 172.16.45.0 172.16.45.28 172.16.45.4 172.16.45.8 How many IP addresses can be assigned to hosts in a C-class network segment with a subnet mask of 255.255.255.128?* 254 126 O O O 192 62 The network address of 172.16.0.0/19 provides how many subnets and hosts? * 7 subnets, 30 hosts each 8 subnets, 8,190 hosts each 8 subnets, 2,046 hosts each 7 subnets, 2,046 hosts each