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Chapter 17
X.25
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Figure 17-1
X.25
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Figure 17-2
X.25 Layers in Relation to the OSI Layers
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Figure 17-3
Format of a Frame
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Figure 17-4
Addressing at the Frame Layer
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Figure 17-5
Three Phases of the
Frame Layer
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Figure 17-6
Frame Layer and Packet Layer Domains
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Figure 17-7
Virtual Circuits in X.25
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Figure 17-8
LCNs in X.25
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Figure 17-9
LCN Assignments
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Figure 17-10
PLP Packet Format
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Figure 17-11
Categories of PLP Packets
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Figure 17-12
Data Packets in the PLP Layer
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Figure 17-13
RR, RNR, and REJ Packets
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Figure 17-14
Other Control Packets
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Figure 17-15
Control Packet Formats
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Figure 17-16
X.25 Address Format
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Figure 17-17
Triple-X Protocols