Exercise: Identify the network portion and host portion forgiven IP address that determine by the subnet mask. Your answershould look like Figure 1.

A- Host address 172.16.2.80 and subnet mask 255.255.0.0

B- Host address 192.168.5.30 and subnet mask /24

C- Host address 10.10.10.10 and subnet mask 255.0.0.0

D- Host address 209.100.100.224 and subnet mask /32

Network and Host Portions Network Portion Host Portion IPv4 Address 192 168 10 10 11000000 10101000 00001010 00001010 Subnet Mask 255 255 255 11111111 11111111 11111111 00000000 Figure 1 32-bit (8 bits. 8bits. 8 bits. 8bits) - a network portion and a host portion determine by a subnet mask. Look at Figure, bit '1' in Subnet mask (i.e 255.255.255.x) represent network portion for host IPv4 address (i.e 192.168.10.x) bit 'O' in subnet mask (i.e x.x.x .0) represent host portion for host IPv4 address (i.e x.x.x.10)