... desktop PCs to maintain. Each time a new version of client software was released, the IT staff had to configure and install the software on each of the 40,000 desktops — a job that typically took ... prefer to use TCP/IP rather than SNA to transport the mainframe/midrange data. In the mid-1980s, the Telnet protocol was extended to carry 3270 and 5250 data. The resulting standards are known as ... only a subset of legacy host applications, namely those that are accessed via a character-based datastream. Granted, these applications have the largest installed base. However, there are a number...