Due to wide network expansion, you've decided to upgrade your network by configuring a DHCP server. The network uses Linux, Windows, and Mac OS X client systems. You configure the server to distribute IP addresses from 192.168.2.1 to 192.168.2.100. You use the subnet mask of 255.255.255.0. After you make all the setting changes on the DHCP server, you reboot each client system, but they are not able to obtain an IP address from the DHCP server. Which of the following explains the failure? You must reboot the DHCP server. 192.168.x.x requires a Class C subnet mask. You must configure the clients to obtain IP addressing from a DHCP server. DHCP does not function in a heterogeneous computing environment.