 TN3270 allows a 3270 terminal emulator to communicate over a TCP/IP network instead of an SNA network.Standard telnet clients cannot be used as a substitute for TN3270 clients, as they use fundamentally different techniques for exchanging data.The Netscape versions offered limited functionality and essentially allowed web-based users to access the 3270 and UNIX, VAX and other computer host systems via the Netscape Navigator and Netscape Communicator web browser.