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CCNA 4 v3.1 Module 3 PPP. Purpose of This PowerPoint. This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1. It was created to give instructors a PowerPoint to take and modify as their own. This PowerPoint is:
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Purpose of This PowerPoint • This PowerPoint primarily consists of the Target Indicators (TIs) of this module in CCNA version 3.1. • It was created to give instructors a PowerPoint to take and modify as their own. • This PowerPoint is: • NOT a study guide for the module final assessment. • NOT a study guide for the CCNA certification exam. • Please report any mistakes you find in this PowerPoint by using the Academy Connection Help link.
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Introduction to Serial Communication Transmission system encodes bits into electrical voltage using methods like NRZ-L or AMI Some of the many serial communications standards include the following: RS-232-EV.35High-Speed Serial Interface (HSSI)
Demarcation Point The point in the network where the responsibility of the service provider or "telco" ends.
DTE/DCE Interface • The DTE/DCE interface for a particular standard defines the following specifications: • Mechanical/physical - Number of pins and connector type • Electrical - Defines voltage levels for 0 and 1 • Functional - Specifies the functions that are performed by assigning meanings to each of the signaling lines in the interface • Procedural - Specifies the sequence of events for transmitting data
Troubleshooting a Serial Interface • Five possible problem states can be identified in the interface status line of the show interface serial display: • Serial x is down, line protocol is down. • Serial x is up, line protocol is down. • Serial x is up, line protocol is up (looped). • Serial x is up, line protocol is down (disabled). • Serial x is administratively down, line protocol is down.
Challenge Handshake Authentication Protocol (CHAP) CHAP provides protection against playback attack through the use of a variable challenge value that is unique and unpredictable.