CCNA 5.0
Planning Guide
Chapter 3: Point-to-Point
Connections
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Chapter 3: Objectives
In this chapter, you will be able to:
 Explain the fundamentals of point-to-point serial communication
across a WAN.
 Configure HDLC encapsulation on a point-to-point serial link.
 Describe the benefits of using PPP over HDLC in a WAN.
 Describe the PPP layered architecture and the functions of LCP and
NCP.
 Explain how a PPP session is established.
 Configure PPP encapsulation on a point-to-point serial link.
 Configure PPP authentication protocols.
 Use show and debug commands to troubleshoot PPP.
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Chapter 3: Overview
 This chapter covers the terms, technology, and protocols used in
serial connections.
 The HDLC and Point-to-Point Protocols (PPP) are introduced.
 PPP is a protocol that is able to handle authentication, compression,
error detection, monitor link quality, and logically bundles multiple
serial connections together to share the load.
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Chapter 3: Activities
What activities are associated with this chapter?
 3.0.1.2 Class Activity – PPP Persuasion
 3.1.1.11 Activity - Identify the Serial Communications Terminology
 3.1.2.6 Syntax Checker – Troubleshooting a Serial Interface
 3.1.2.7 Packet Tracer – Troubleshooting Serial Interfaces
 3.2.2.5 Activity – Identify PPP Features and Operations
 3.2.3.6 Activity – Identify the Steps in the LCP Link Negotiation
Process
 3.3.1.4 Syntax Checker – PPP Link Quality Monitoring Command
 3.3.2.6 Syntax Checker – PAP and CHAP Authentication
Configuration
 3.3.2.7 Packet Tracer – Configuring PAP and CHAP Authentication
 3.3.2.8 Lab – Configuring Basic PPP with Authentication
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Chapter 3: Activities (cont.)
What activities are associated with this chapter?
 3.4.1.4 Packet Tracer – Troubleshooting PPP with Authentication
 3.4.1.5 Lab – Troubleshooting Basic PPP with Authentication
 3.5.1.1 Class Activity – PPP Validation
 3.5.1.2 Packet Tracer – Skills Integration Challenge
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Chapter 3: Packet Tracer Activity Password
The password for all the Packet Tracer activities in this chapter is:
PT_ccna5
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Chapter 3: Assessment
 Students should complete the Chapter 3 Exam after completing
Chapter 3.
 Worksheets, labs and quizzes can be used to informally assess
student progress.
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Chapter 3: New Terms
What terms and commands are introduced in this chapter?
3.1.1.1
3.1.1.2
3.1.1.4
3.1.1.5
3.1.1.6
3.1.1.7
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Point-to-point Connection
Serial Communication
Parallel Communication
RS-232
V.35
HSSI
Multiplexing
Time-division Multiplexing
Multiplexer
Statistical Time-division Multiplexing
Synchronous Optical Network (SONET)
Synchronous Digital Hierarchy (SDH)
Local Loop
Customer Premises Equipment (CPE)
Demarcation Point
CSU/DSU
Network Terminating Unit (NTU)
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Chapter 3: New Terms (cont.)
What terms and commands are introduced in this chapter?
3.1.1.8
DTE
DCE
Electronics Industry Association (EIA)
International Telecommunication Union Telecommunications
Standardization Sector (ITU-T)
3.1.1.9 null modem
DB9
DB60
EIA/TIA-232
EIA/TIA-449
X.21
EIA/TIA-530
Smart serial cable
3.1.1.10 DS0, DS1, etc.
T1/T3
E1/E3
OC-X
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Chapter 3: New Terms (cont.)
What terms and commands are introduced in this chapter?
3.1.2.1
3.1.2.3
3.1.2.5
3.2.1.1
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HDLC
PPP
Serial Line Internet Protocol (SLIP)
X.25/Link Access Procedure Balanced (LAPB)
Frame Relay
PAP
CHAP
ATM
Circuit-switched
Packet-switched
Information Frames (I-frames)
Supervisory Frames (S-frames)
Unnumbered Frames (U-frames)
show controllers serial command
Link Control Protocol (LCP)
Network Control Protocols (NCPs)
IPv4, IPv6, Novell IPX, AppleTalk Control Protocol
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Chapter 3: New Terms (cont.)
What terms and commands are introduced in this chapter?
3.2.1.2
3.2.2.4
3.2.3.1
3.2.3.2
3.2.3.3
Presentation_ID
Password Authentication Protocol (PAP)
Challenge Handshake Authentication Protocol (CHAP)
Frame Check Sequence (FCS)
Link Establishment And Configuration Negotiation
Link Quality Determination
Network Layer Protocol Configuration Negotiation
Configure-Request
Configure-Ack
Configure-Nak
Configure-Reject
Code-Reject
Protocol-Reject
Echo-Request
Echo-Reply
Discard-Request
Terminate-Request
Terminate-Ack
Code Identifier
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Chapter 3: New Terms (cont.)
What terms and commands are introduced in this chapter?
3.2.3.4
3.3.1.1
3.3.1.2
3.3.1.3
3.3.1.4
3.3.1.5
3.3.1.6
3.3.2.2
3.3.2.3
3.3.2.5
3.3.2.6
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Compression
Multilink
Stacker
Predictor
Error Detection
Magic Number
PPP Callback
encapsulation ppp command
compress predictor command
ppp quality percentage command
interface multilink 1 command
ppp multilink command
ppp multilink group 1 command
show ppp multilink command
ppp authentication pap command
Message Digest 5 (MD5)
ppp authentication chap command
username name password password command
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Chapter 3: New Terms (cont.)
What terms and commands are introduced in this chapter?
3.4.1.1
3.4.1.2
3.4.1.3
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debug
debug
debug
debug
debug
ppp
ppp
ppp
ppp
ppp
command
packet command
negotiation command
error command
authentication command
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Chapter 3: Best Practices
Prior to teaching Chapter 3, the instructor should:
 Complete Chapter 3 Assessment.
 Ensure all activities are completed. This is a very important
concept and hands-on time is vital.
 Provide the students many PPP troubleshooting activities.
 Encourage students to login with their cisco.com login and
download
http://docwiki.cisco.com/wiki/Internetworking_Technology_Handbo
ok
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Chapter 3: Additional Help
 For additional help with teaching strategies, including lesson plans,
analogies for difficult concepts, and discussion topics, visit the
CCNA Community at http://community.netacad.net/web/ccna/files.
 If you have lesson plans or resources that you would like to share,
upload them to the CCNA Community to help other instructors.
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Chapter 3: Topics Not in ICND2 200-101
 This section lists topics covered by this chapter that are NOT listed
in the ICND2 200-101 Blueprint. Those topics are posted at
http://www.cisco.com/web/learning/exams/list/icnd1b.html.
 Instructors could skip these sections; however, they should provide
additional information and fundamental concepts to assist the
student with the topic.
 ALL TOPICS IN CHAPTER 3 ARE OBJECTIVES OF THE ICND2.
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