Figure 4.3 Centralized deployment model using routers or bridges.
In a centralized model, SNA Server computers are deployed physically near the host to which they provide connectivity. The centralized SNA Server computers provide split-stack 3270 and AS/400 access for local and remote desktops that connect to the gateways using a routable protocol such as TCP/IP. Other desktop or server-based LU 0, LU 6.2 (APPC), or telnet applications can connect through these gateways from anywhere on the WAN.