• Figure 1: Two nodes are all you need to set up the test network.

    Switchboard

    Netcat is the Swiss Army knife of networking for admins. Socat takes this principle one step further, offering multiplexing, TLS-secured channels, pipes, Unix sockets, and executables.

  • Figure 1: cksfv command-line options.

    Check It!

    cksfv and the CRC32 algorithm can't compete with modern methods as a way to look for intruders, but if you're just checking for random errors such as a misplaced bit, this ancient tool could still be of service.

  • © Lead Image © Andrey Burmakin, 123RF.com

    Feed the Meter

    Parking meters and vending machines detect and count the coins you insert, but how do they work? We'll show you how to mimic the functionality with some particleboard, a Raspberry Pi Pico, a few extra chips, and some Python code.

  • Doghouse – High-Level Languages

    With all the benefits of high-level languages, there's still good value in learning assembly- and machine-level languages today.

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