This week, I gave a two hour talk to the Freehold High School Computer Science Academy on how VoIP works. This ended up being quite a bit of work actually, since I needed to distill my existing tutorials to something a high school student could understand. I ended up needing to explain a bunch of core IP concepts first. Here's what I came up with. The feedback from the students was positive - many said they understood it! You can find the PPT here. Comments on the content are most welcome.