@Ubuntu-HP-635:~$ dpkg -l | grep dhcp
ii  isc-dhcp-client                                       4.2.4-7ubuntu12.3                                   amd64        ISC DHCP client
ii  isc-dhcp-common                                       4.2.4-7ubuntu12.3                                   amd64        common files used by all the isc-dhcp* packages
ii  isc-dhcp-server                                       4.2.4-7ubuntu12.3                                   amd64        ISC DHCP server for automatic IP address assignment
rc  isc-dhcp-server-ldap                                  4.2.4-7ubuntu12.3                                   amd64        DHCP server able to use LDAP as backend