Managing internet protocol address based on dynamic host configuration protocol

Internet Protocol (IP) addresses are generated based on a Dynamic Host Configuration Protocol (DHCP) to manage an Internet Protocol address and an identifier (ID) of a network unit seeking access to a network using the Dynamic Host Configuration Protocol to allow the network unit to have easy access to an external server providing a variety of services (e.g., a home network service). A Dynamic Host Configuration Protocol server is adapted to dynamically assign the Internet Protocol address when the network unit seeks access to the network, the network unit being connected to an external Internet network using the Internet Protocol address assigned dynamically from the Dynamic Host Configuration Protocol server. A network unit management server is adapted to manage information on the Internet Protocol address assigned by the Dynamic Host Configuration Protocol server and the identifier of the network unit corresponding to the Internet Protocol address. A service provider server is adapted to receive a service request of a subscriber to transmit a service processing result of the service request to the corresponding network unit managed by the network unit management server.