DHCP is useful for automatic configuration of client
network interfaces. When configuring the client system,
the administrator chooses DHCP instead of specifying an IP
address, netmask, gateway, or DNS servers. The client
retrieves this information from the DHCP server. DHCP is
also useful if an administrator wants to change the IP
addresses of a large number of systems. Instead of
reconfiguring all the systems, he can just edit one DHCP
configuration file on the server for the new set of IP
addresses. If the DNS servers for an organization changes,
the changes are made on the DHCP server, not on the DHCP
clients. When the administrator restarts the network or
reboots the clients, the changes will go into effect.
If an organization has a functional DHCP server properly
connected to a network, laptops and other mobile computer
users can move these devices from office to office.