DHCP?
DHCP (Dynamic Host Configuration Protocol) is the protocol that automatically assigns each computer an IP address on a network. Typically, a router negotiates with the computers on the network and then assigns an local IP address to each computer. Additionally, DHCP uses the concept of a lease or amount of time that a given IP address will be valid for a computer. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are available IP addresses. BellSouth does not use DHCP to assign WAN IP addresses. Click here for more info.
