Chapter 1 59
SNA Terms and Concepts
Basic APPN Concepts
Figure 1-9 APPN Network Using a Shared-Access Transport Facility
If Node EN1 has a link definition for each of the links in the network, it
can establish a direct link to any node. The link definitions needed to
support direct links between Node EN1 and every other node in the
APPN network are shown in Figure 1-10, “Definitions Needed for Direct
Links from Node EN1 to Every Node in an APPN Network.” For a
network that includes five other nodes, Node EN1 needs five link
definitions:
• EN1 to NNA
• EN1 to EN2
• EN1 to EN3
• EN1 to EN4
• EN1 to EN5