The Dynamic Host Configuration Protocol provides configuration parameters to Internet （ ） . DHCP consists of two components: a   （ ）  for delivering host-specifie configuration parameters from a DHCP server to a host and a mechanism for allocation of network addresses to hosts. DHCP is built on a client-server model, where designated DHCP server hosts allocate network addresses and deliver    （ ）   parameters to dynamically configured hosts. DHCP supports 

three mechanisms for IP address allocation. In “automatic allocation”, DHCP assigns a     （本题） IP address to client. In “dynamic allocation”, DHCP assigns an IP address to a client for a limited period of time. In “manual allocation”, a client’s IP address is assigned by the network    （ ）  , and DHCP is used simply to convey the assigned address to the client.