to connect terminals for systems programmers because this connection requires little or
no customization.
SNA 3270 connections. These could be via coax, LANs, or SDLC connections, or through
links to other VTAM or NCP nodes. This was (and still is) a common environment for larger
networks, although many existing installations are moving to TCP/IP bases. There are
many variations of this, with SNA control units and with directly-attached SNA client 3270
emulators.
TN3270 TCP/IP connections to z/OS. These are LAN connections using TN3270 clients.
All of these connection modes work with z/OS under FLEX-ES and there a ...
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