This is an interesting example of mistake proofing for a simple connector: the well-known ethernet cable connector... as many other people around the world, you probably have broken the small plastic piece clicking into the female connector to secure the connection. This is a major design flaw because those things break too easily if you move the cable...
I just found a new type of cable with a simple mechanical protection avoiding the issue. I am traveling a lot with such a cable and I broke a few of them very quickly... I am now using the new design for months, not a problem.
The old design (broken)
The better design