DHCP is based on BOOTP and maintains some backward compatibility. The maindifference is that BOOTP was designed for manual pre-configuration of the hostinformation in a server database, while DHCP allows for dynamic allocation of network addresses and configurations to newly attached hosts. Additionally,DHCP allows for RECOVERY and REALLOCATION of network addresses through aleasing mechanism.
RARP is a protocol used by Sun and other vendors that allows a computer to findout its own IP number, which is one of the protocol parameters TYPICALLY passedto the CLIENT SYSTEM by DHCP or BOOTP. RARP doesn't support other parametersand using it, a server can only serve a single LAN. DHCP and BOOTP aredesigned so they can be routed.

DHCP is based on BOOTP and maintains some backward compatibility. The maindifference is that BOOTP was designed for manual pre-configuration of the hostinformation in a server database, while DHCP allows for dynamic allocation of network addresses and configurations to newly attached hosts. Additionally,DHCP allows for recovery and reallocation of network addresses through aleasing mechanism.
RARP is a protocol used by Sun and other vendors that allows a computer to findout its own IP number, which is one of the protocol parameters typically passedto the client system by DHCP or BOOTP. RARP doesn't support other parametersand using it, a server can only serve a single LAN. DHCP and BOOTP aredesigned so they can be routed.