Multiplexing is necessary because the remote/local port for an open TCP connection acts like a temporary cookie, uniquely identifying a browsing session. The m

Multiplexing is necessary because the remote/local port for an open TCP connection acts like a temporary cookie, uniquely identifying a browsing session. The more time you can keep a connection open and the more requests over it the more tracking you can do. 'Ideally' you'd have one connection to google-analytics and keep it open for many minutes for better user tracking.