I'm not sure I fully understand, but with my assumptions in hand: That's bit of an implementation detail, I think. If my app is the most amazing file system i

I'm not sure I fully understand, but with my assumptions in hand: That's bit of an implementation detail, I think. If my app is the most amazing file system indexer using PostgreSQL behind the scenes, I don't think the "port" distinction is relevant... oh, wait. You're thinking of ports as in INET vs. plain sockets? That took me a long time to get. A very technical way to put it, but thank you.