For instance, a client program looking for TCP ports 20 or 21 needs File Transfer Protocol services. Like an electrical socket and plug, the server and client programs connect and data begins to ...

This tutorial is an introduction to socket programming in Java, starting with a simple client-server example demonstrating the basic features of Java I/O. You’ll be introduced to both the ...

Figure 2 is a diagram that shows a few FTP commands and their responses from the server. Figure 2. The client issues FTP commands over the control connection to set up the file transfer. Socket ...