When you think about it, the candidate isn't even that wrong. Back then, at university, a certain professor would explain the oral exam to the candidate at the beginning. He would explain that he would incrementally increase the difficulty and skip from area to area. The goal would be to find the limits of the student's knowledge, the student would walk away feeling terrible, and he, the professor, didn't enjoy the experience.

That's how it ought to be, but here? OK, candidate doesn't know ICMP well, next topic, no need to waste time and dig in.

Here's another unfavourable thought: some people with abusive childhoods react very badly to dominance displays, and here is Rachel engaging in just that. One wonders what had happened before.