> 1. I still don’t know very much

> “How can you not know what BGP is?”

I learned a while ago that answering someone who asks you "What is X?" and replying with a phrase similar to the above is probably one of the worst ways to broach the subject. It comes off as questioning the person's intelligence/knowledge.

Instead try to see it as a teachable moment. If it is something you think is cool and/or you are passionate about, you should be excited that you can show your friend/coworker something really cool. ie: "I've never seen Rick and Morty", "You are absolutely going to love that show. I know what you will be binge watching this weekend!"

Anyhow, to put it bluntly, don't be a dick about it.