Is That a CID?

IPFS is an immutable data structure, but you can reference those blocks individually. So now let's say on the other side of the world, I ask for the root CID, the star at the tip of that tree. And it goes out and asks the network, finds your computer,. Then it will ask for all of the blocks going down that graph, each individual. This is similar to BitTorrent, isn't it? Isn't that what BitTorrent also does? Yeah, at a high level, that pattern is very similar.