An etude in music is a piece of music meant more to be practiced than to be performed. They are designed to help the performer develop and maintain their technical and artistic skills. In that same vein, I am developing various etudes for students in cyber security to help them hone particular technical skills.
Our first is on the use of wireshark. It is aimed at students with some familiarity with the tool, but who have not yet really used the tool to answer some practical questions.