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CCNA 4 Chapter 13 

PPP

By

PRAVEENKUMAR P.J

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Serial Communication

Some serial communications standards include thefollowing:

RS-232-E V.35 High-Speed Serial Interface (HSSI) 

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Time-Division Multiplexing

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Demarcation Point

The point in the network where the responsibility of theservice provider or "telco" ends. 

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DTE-DCE

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Serial Connection Options

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HDLC Encapsulation

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Configuring HDLC

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Troubleshooting a Serial

Interface• Five possible problem states can be

identified in the interface status line of theshow interface serial

display:1. Serial x is down, line protocol is down.

2. Serial x is up, line protocol is down.

3. Serial x is up, line protocol is up (looped).

4. Serial x is up, line protocol is down (disabled).

5. Serial x is administratively down, line protocol isdown.

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PPP Authentication

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PPP Layered Architecture

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PPP and the Data Link Layer

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PPP and the Network Layer

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Establishing a PPP Session

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LCP Options

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PPP Configuration Options

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LCP

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NCP

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PPP Authentication Protocols

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PPP Authentication

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PAP

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CHAP

CHAP provides protection against playback attackthrough the use of a variable challenge value that isunique and unpredictable.

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PPP Encapsulation and

Authentication Process

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CHAP Authentication Process

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Configuring PPP

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Configuring PPP

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Configuring PPP Authentication

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PAP Configuration

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CHAP Configuration

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PPP Configuration Commands

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Verifying PPP

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Debug PPP Authentication