EDIT: I was wrong, see child comments and the sibling comment from jacuqesm. --- Yes, it is listening on a single port, but accepted connections bind to a sep

EDIT: I was wrong, see child comments and the sibling comment from jacuqesm. --- Yes, it is listening on a single port, but accepted connections bind to a separate socket. Here's how it works under the hood: > The accept() call creates a new socket descriptor with the same properties as socket and returns it to the caller. [...] The new socket descriptor cannot be used to accept new connections. The original socket, socket, remains available to accept more connection requests. Pulled this from random IBM zOS docs, but it's in compliance with the Unix standard: https://www.ibm.com/docs/en/zos/2.4.0?topic=functions-accept-accept-new-connection-socket https://www.ibm.com/docs/en/zos/2.4.0?topic=functions-accept...