How many dynamic DHCP clients are there?
Hundreds of millions.
There are hundreds of millions of network users that use the Dynamic Host Configuration Protocol (DHCP) to get their IP address assignments. Theoretically, there can be as many DHCP users as there are possible IP addresses, which is 4,294,967,296 or 232. For every router handling networked computers, the maximum number of users using DHCP is 254.