Two common ways for tackling network problems are troubleshooting or upgrading. For the success of both processes, a complete documentation, which encounters a number of essential factors, should be in existence. Among of these known factors is network topology. When a network is to cover a large geographical area, which is a common case nowadays, the topology mapping is likely to be more difficult. Motivated by this reason, a specific application, called Netmap, was designed to be able to map any given network topology remotely. Through the testing phase on various network topologies, Netmap showed a success percentage of 88% with an average execution time of 32.05 seconds. Besides, Netmap can provide the user with specific information the about existing devices, such as hostname, IP address and MAC address. For further improvement, the future application is expected to be able to deal with extracting more data and compatible on multiplatform.