2.1.2 DHCPM Client Security Settings
The DHCP client SHOULD use SSP security provided by RPC as specified in [MS-RPCE] for sessions using TCP, LPC, or named pipes as the transport protocol. The DHCP client SHOULD authenticate using the following:
RPC_C_AUTHN_GSS_NEGOTIATE
A DHCP client using TCP, LPC, or named pipes as the transport SHOULD request RPC_C_AUTHN_LEVEL_PKT_PRIVACY authentication with the DHCP server.<5>