[Twirrim]

Why would someone need to learn about load balancers in high school or earlier?

Also, don't mistake her teaching approach as indicating the people in the room weren't aware of what load balancers are or how they work. It's a good teaching technique to start out with some basic ground-work leading in to the point you wish to make. Starting out as she does ensures that everyone in the group knows _exactly_ what she's talking about before she gets to the key point, _and_ should be able to immediately understand what is going on and why.

Regardless of that, there's a lot of subtleties of dealing with load balancers that people rarely think of until they've been bitten by them. I've used load balancers quite regularly when interviewing candidates because I can almost always find some aspect of land balancers and load balancer behaviour that people aren't aware of. That gives me an ideal chance to explore a subject with a candidate and find out how quickly they can piece things together and learn.