Whenever we’re designing a network, we’re trying to assign at least one continuous block of IP addresses for an automatic client assignment. Using the DHCP server, we can make network administration much easier. We can even use the DHCP server to assign an IP address for the servers in our network.
When the DHCP server spots a previously existing IP address from its DHCP leases pool, it will block that address from further assignment. This mechanism will prevent duplicated IP addresses in the same network segment.