>From my understanding, when a client connected to the server stack at a particular port, that port is tied up and no one else can connect to it.
If I remember correctly, when you FTP to port 21, the FTP server responses with another port that you should use for the rest of the FTP session. This keeps port 21 from being tied up during long FTP sessions. Right? OK, how does this concept work with Telnet, port 23? Is my client being transferred to other ports? Are all of my hundreds of telnet sessions, all using the same port 23? Are they using it "one at a time"? When I hit enter, and it takes 5-10 seconds to get a response, is my client tieing up the port so no one else can use it? All of that, just doesn't sound right. Is there a concept of "shared ports"? Just how it short tasks like telnet (tn3270), and I guess, webservers (port 80), handle this? Where is the documentation that may explain how things are done, for what service? Thanks Tom Duerbusch THD Consulting
