Combined DHCP/DNS Server. DHCP Server allots addresses and DNS Server first try resolving from DHCP allotted names then from Cache then forwarding to External DNS. Relay Agent, PXEBOOT and BOOTP, Zone Replication, Auto Config and auto Dynamic DNS update. -Combined DHCP / DNS Server. All DHCP Server ots addresses and DNS Server first try resolvin g from DHCP allotted names then from then f Cache orwarding to External DNS. Relay Agent, PXEBOOT and BOOTP, Zone Replication. Auto and auto Config Dynamic DNS update.