Hi boardgame,
Choosing dedicated does not have anything to do with dhcp.
A dedicated core (even core/hybid) runs dhcp server, mysql server, etc..
Your standalone core system should have two NIC cards. One to connect to the outside world (internet) and one to service your internal LMCE LAN network (MD's).
If you are trying to set this up on only one PC you must choose core/hybrid.