A method for managing topology of a local area network said local area network comprising: a plurality of access points which exchange packet information with each other said method comprising the steps of: by each of said access points by using a management protocol: querying/probing the access points neighboring each of said access points through a packet said packet indicating a Layer 2 1905.1 protocol; confirming one of said each of said access points to be capable of allocating network addresses for devices in the local area network according to a message of responding to a DHCP request; and designating the access point which is capable of allocating the network addresses as a master access point of the local area network according to the message of responding to the DHCP request; by the designated master access point: broadcasting messages including notification of network address of the master access point to each of all other access points; by each of all the other access points: acquiring the network address of the designated master access point from the broadcasted messages from the master access point using the management protocol; and transmitting operating information to the designated master access point using the management protocol, and by the designated master access point: receiving operating information from each of all the other access points; wherein the designated master access point operates as a server allocating network addresses through a DHCP service. by each of said access points by using a management protocol: querying/probing the access points neighboring each of said access points through a packet said packet indicating a Layer 2 1905.1 protocol; confirming one of said each of said access points to be capable of allocating network addresses for devices in the local area network according to a message of responding to a DHCP request; and designating the access point which is capable of allocating the network addresses as a master access point of the local area network according to the message of responding to the DHCP request; by the designated master access point: broadcasting messages including notification of network address of the master access point to each of all other access points; by each of all the other access points: acquiring the network address of the designated master access point from the broadcasted messages from the master access point using the management protocol; and transmitting operating information to the designated master access point using the management protocol, and by the designated master access point: querying/probing the access points neighboring each of said access points through a packet said packet indicating a Layer 2 1905.1 protocol; confirming one of said each of said access points to be capable of allocating network addresses for devices in the local area network according to a message of responding to a DHCP request; and designating the access point which is capable of allocating the network addresses as a master access point of the local area network according to the message of responding to the DHCP request; by the designated master access point: broadcasting messages including notification of network address of the master access point to each of all other access points; by each of all the other access points: acquiring the network address of the designated master access point from the broadcasted messages from the master access point using the management protocol; and acquiring the network address of the designated master access point from the broadcasted messages from the master access point using the management protocol; and transmitting operating information to the designated master access point using the management protocol, and by the designated master access point: receiving operating information from each of all the other access points; wherein the designated master access point operates as a server allocating network addresses through a DHCP service.