If you are unable to find a free Modbus Slave simulator, here is one.
Latest TCP/IP Articles - Page 2
This program watches for DNS requests, lists them, and allows you to save them to block certain sites.
TCP Ping is necessary when measuring server functionality from different IP networks (mirror sites).
Updated to version 4. This library enumarates the TCP/IP protocol, and allows the user to create custom TCP/IP headers, this allows IP spoofing and more.
Networked Simulated Plants (NSP) is a frame program that connects a Modbus/TCP server with a automation simulation. It delivers Ethernet I/O to programmable logic controllers (PLCs).
Learn how to develop a simple but effective port scanner for Win32, using a self written socket classes (not the CSocket which comes with MFC) and a small framework based on the CPropertySheet/CPropertyPage classes.
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Learn to implement exception handling mechanism in C++.
Computer software used to be written for serial computation by a serial computer. Circumvent that concept and work in parallel streams.
With .NET Standard, you only have to master one platform, which will be able to run on all .NET platforms.
It's good practice to use code metrics to validate code; it will improve code quality and make your application maintainable and less complex.