isc-dhcp-server 4.4.3-P1-2ubuntu5 (amd64 binary) in ubuntu mantic

 This is the Internet Software Consortium's DHCP server.
 .
 Dynamic Host Configuration Protocol (DHCP) is a protocol like BOOTP
 (actually dhcpd includes much of the functionality of bootpd). It
 gives client machines "leases" for IP addresses and can
 automatically set their network configuration.
 .
 This server can handle multiple ethernet interfaces.