Okay. ftp://, http://, https:// are associate with protocols that operate on a common port. You can execute “cat /etc/protocol” (on macOS or Linux terminal) and see each associate common port and their protocol name.
The protocol is associated with a port that is open on a host, which is associated with a process in the OS and that process listens and “talks” those ways when a host connects with a client, like a web browser.



Those seem like legal definitions because at the root of it it’s (IMO) “applying severe fear to coerce someone to act to avoid further acts of severe fear (usually in favor of the fear actor).”