
Data Compression Overview
1-5
Figure 1-1. CCP, WCP, and NCP Initialization on a PPP Link
Router A Router B
1. PPP interface on network; LCP negotiations complete; begin CCP negotiations:
Send Initialization-Request
Send Initialization-Request
Send Initialization-ACK
Send Initialization-ACK
2. CCP negotiations complete; begin WCP negotiations, including compression mode,
history size, and buffer size:
Send Configure-Request
Send Configure-Request
Send Configure-ACK
Send Configure-ACK
Send Initialization-Request
Send Initialization-Request
Send Initialization-ACK
Send Initialization-ACK
3. WCP negotiations complete; begin NCP negotiations:
4. NCP open; begin transmitting data:
Send Data
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