SNA/APPN (1)

• Second generation of SNA

• Components

  • APPN environment
  • Logical Units 6.2 - governs peer-to-peer communication in an SNA environment
  • Node Type 2.1 - logical entities that permit direct communication beetween nodes
  • Advanced Program to Program Computing - provides a set of programming conventions and protocols that implement LU6.2

• Node types

  • Low-end nodes (LENs) - terminals
  • End Nodes (ENs) - terminal servers
  • Network Nodes (NNs) - routers

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