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44 Chapter 1
SNA Terms and Concepts
Basic APPN Concepts
• Network nodes (see “APPN Network Nodes”)
• End nodes (see “APPN End Nodes”)
In addition, low-entry networking (LEN) nodes can be connected to an
APPN network, but they do not use APPN features (see “LEN Nodes”).
A sample APPN network that includes all of these node types is shown in
Figure 1-4, “Portion of a Sample APPN Network.”
Figure 1-4 Portion of a Sample APPN Network
This example shows an APPN network that includes five network nodes
(NNs), three end nodes (ENs), and a LEN node. The network nodes form
the backbone of the APPN network; end nodes access the network
through the network nodes. LU 6.2 TPs on any node can communicate
with any other LU 6.2 TPs in the network.