496 Chapter 13: SNA Internetworking
Foundation Summary
This section contains tables that provide a convenient review of many key concepts in this
chapter. If you are already comfortable with the topics in this chapter, this summary could help
you recall a few details. If you have just read this chapter, this review should help solidify some
key facts. If you are doing your final preparation before the exam, these tables are a convenient
way to review the day before the exam.
Table 13-2 compares the APPN model with the OSI model.
In Table 13-3, match the following components with their description.
Table 13-2
APPN Model Versus the OSI Model
SNA/APPN
OSI Reference Model
Application
Application layer
APPC/LU 6.2
Presentation layer
APPN path control
Session layer
APPN path control
Transport layer
APPN path control
Network layer
Data link control layer
Data link layer
Physical control layer
Physical layer
Table 13-3
SNA Components
1. LLC1
A. Supports border peers and border groups
2. DLSw+
B. Distributed directory services
3. APPN
C. Connectionless without acknowledgment
4. DLUR
D. Attaches the router directly to a mainframe
5. SDLLC
E. Always used for SNA and NetBIOS sessions
6. LLC2
F. Should be implemented in a network with few alternative paths
7. FST encapsulation
G. Connects FEPs across a multiprotocol backbone
8. CIP
H. Controls RSRB explorers
9. STUN
I. Developed for legacy LUs
10. Proxy Explorer
J. Converts SDLC into Token Ring frames
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