Complete Protocol dictionary, glossary and reference
DHCP: Dynamic Host Configuration Protocol
Dynamic Host Configuration Protocol (DHCP) is a communications protocol enabling network administrators to manage centrally, and to automate, the assignment of IP addresses in a network. In an IP network, each device connecting to the Internet needs a unique IP address. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network.
RFC 2131 and RFC 3396