Simple SubnetMask&Advanced VLSM Calculator 3.0

The application is characterized by ease of use, fast performance and high accuracy in the result.
This application contains many features, including:
1. Normal conversion of the subnetmask(Subnetmask Calculator).
2 - Advanced conversion (VLSM Calculator)of the subnetmask with the possibility of dividing the IP address into five doubts as one of the sections you need in the actual work environment, such as the section of the department of Human Resources and the department of servers and the department of investigations and the department of settlement and other examples.
3 - This application also includes the conversion between the numbers hex, decimal, binary, octal.
4 - Also important information about the port numbers and protocols used of TCP/IP.