You will need
  • - special scanning program.
Any networked device has a network IP address or MAC address. In order to test the network, applications scanners. There are many such programs, but the greatest popularity to name a few.
The most famous and popular scanner is nmap. The program allows you to scan given address range, it has plenty of settings allowing you to select the optimal scan mode. It is worth noting that this scanner is most popular among hackers. Among the shortcomings of the scanner for the average user is the fact that it works in console mode. However, there is also a version with familiar to Windows users gui-based – Zenmap.
Download the file and run the installation program. After the installation has finished, run Zenmap. In the opened window specify the scanning purpose, it can be as specific IP address and a range. For network scanning you need to specify a range to determine the active device that is connected to the network and have an IP address. Will also need to set the scan options. Since the program has a huge number of settings for different scanning options with them to get better acquainted in the guidebook.
If you just want to check some range for the presence of working machines, use a simple but very handy utility Angry IP Scanner. Online you can find the second and third version, the second (for example, version 2.20) is more convenient. Running the program, specify the start and end value of port range, and in settings – the scanned ports. You can specify a list of individual ports and the range. The program starts scanning the band, bringing in the list of found devices. "Live" addresses are marked in green circles that do not meet red. In the settings (Options – ... Options - Only open ports), you can configure the program to output only active resources. The scan results can be saved in a text file.