A host with an IP address of 172.16.10.1 has network and host portion as:10111111.11111111.11000000.00000000

The IP address 172.16.10.1 in binary is 10101100.00010000.00001010.00000001.

The network and host portion you provided (10111111.11111111.11000000.00000000) is a subnet mask in binary. This subnet mask corresponds to 255.255.192.0 in decimal.

To determine the network and host portions of the IP address, we perform a bitwise AND operation between the IP address and the subnet mask.

IP Address: 10101100.00010000.00001010.00000001 (172.16.10.1) Subnet Mask: 10111111.11111111.11000000.00000000 (255.255.192.0)

Result: 10101100.00010000.00000000.00000000

This result is the network address. The remaining bits represent the host portion. So, the network portion is 172.16.0.0 and the host portion is 0.0.10.1.