Abstract: Various embodiments of the teachings herein include a network topology construction method. The method may include: acquiring a MAC address table of each port on each switch in a target network; determining a first connection relationship in the target network according to the MAC addresses of terminal devices in the target network included in each acquired MAC address table; determining at least one first port according to the first connection relationship in the target network; determining a second connection relationship in the target network according to the MAC addresses included in the MAC address table of each of the first ports in the target network; and determining a network topology of the target network according to the first connection relationship and the second connection relationship in the target network.