I always use this story to illustrate just how dire the standard of lecturing is at my uni.

A lecturer asked that question to a class I was in last year. I answered with the usual reply about a hub broadcasting and a switch directing to specific ports.

His answer was 'er, no' with a smug grin.

Not quite sure what to say to that, I just looked at him, puzzled.

He went on the explain that switches were solely for connecting 10Mbit and 100Mbit networks together. 'Nothing more, nothing less' were his words.

In a later lecture, the same guy, talking about email, told us that POP3 stands for Point Of Presence 3. 'It's got nothing to do with post offices' he said. By that point everyone in the class had learned not to bother trying to correct him.