CCNA：Cisco Certified Network Associate学习指南（英文升级版）

　　Welcome to the exciting world of Cisco certification！ You have pickedup this book because you want something better; namely， a better job withmore satisfaction. Rest assured that you have made a good decision. Cisco certification can help you get your first networking job， or more money and a promotion if you are already in the field. Cisco certification can also improve your understanding of the internetworking of more than just Cisco products： You will develop a complete understanding of networking and how different network topologies work together to form a network. This is beneficlal to every networking job and is the reason Cisco certification is in such high demand， even at companies with fewCisco devices. Cisco is the king of routing and switching， the Microsoft of the internetworking world. The new Cisco certifications reach beyond the popular certifications， such as the MCSE and CNE， to provide you with an indispensable factor in understanding today's network-insight into the Clsco world of intemetworking. By deciding that you want to become Cisco certified， you are saying that you want to be the best-the best at routing and the best at switching. This book can lead you in that direction.

暂缺《CCNA：Cisco Certified Network Associate学习指南（英文升级版）》作者简介

Contents
Introductton
ASsessment Test
Chapter 1 Internetworking
IntemetWorking Models
The Layered APproach
Advantages of Reference Models
The OSI Reference Model
The OSI Layers
Ethemet Networking
Half and Full-Duplex Ethemet
Ethernet at the Data Link Layer
Ethernet at the Physical Layer
Data Encapsulation
The Cisco Three--Layer Hierarchical Model
The Distribution Layer
The Access Layer
Assembling and Cabling Cisco Devices
Cabling the Ethernet Local Area Network
Ethemet Media and Connector Requirements
UTP Connections (RJ--45)
Cabling the Wide Area NetWork
Selecting Cisco Products
Cisco Hubs
Cisco Routers
Cisco Switches
Summary
Key Terms
Written Labs
Lab 1 l: OSI Questlons
Lab 12: Defining the OSI Layers and Devices
Lab 13: Identifytng Collision and Broadcast Don
Review guestions
Answers to the Written Labs
Answers to Lab l l
Answers to Lab 12
Answers to Lab 13
Answers to Review Questions
Chapter 2 Switching Technologies
Layer-2 Switching
Limitations of Layer--2 Switching
Bridging versus LAN Switching
Three Switch Functions at Layer 2
Address Learning
Forward/Filter Decisions
Loop Avoidance
Spannlng--Tree Protocol (STP)
Spanning--Tree Operations
Selecting the Root Bridge
Selecting the Designated Port
Spanning--Tree Port States
Spanning--Tree Example
W Switch bees
Store and Forward
Cut--Through (Real Time)
FragmentFree (Modified Cut--Through)
Summary
Key Terms
Written Lab
Review guestions
Answers to the Written Lab
Answers to Review guestions
Chapter 3 1nteruet Protocol
TCP/IP and the DoD Model
The Process /APplication Layer Protocols
The Host-to-Host Layer Protocols
The Internet Layer Protocols
IP Addressing
IP Terminology
The Hlerarchical IP Addressing Scheme
Subnetting
Subnet Masks
Subnetting Class C Addresses 
Subnetting Class B Addresses
Soubnetting Class A Addresses
Soummary
Key Terms
Written Lab
Review guestions
Answers to the Written Lab
Answers to Review guestions
Chapter 4 Configuration and 1OS Management Commands
Cisco Router User Interface
Cisco Router IOS
Connecting to a Cisco Router
Bringing Up a Router
Command-Line Interface
Logging into the Router
Overview of Router Modes
CLI Prompts
Editing and Help Features
Gathering Basic Routing InfOrmation
Soetting the Passwords
Banners
Router Interfaces
Hostnames
Descriptions
Viewing and Saving Configurations
Verifying Your Configuration
Soummary
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab 4 1: Logging into a Router
Lab 42: Using the Help and Editlng Features
Lab 43: Saving a Router Configuration
Lab 44: Setting Your Passwords
Lab 45: Setting the Hostname Descriptions
IP Address and Clock Rate
Review guestions
Answers to the Written Lab
Answers to Review guestions
Cbapter 5 IP Routing
Routing
The IP Routing Process
IP Routing in a Larger NetWork
IP Routlng in Our Network
Static Routing
Default Routing
Dynamic Routing
Administrative Distances
Routing Protocols
Routing Loops
Routing Information Protocol (RIP)
RIP Timers
Configuring RIP Routing
Verifying the RIP Routing Tables
Holding Down RIP Propagations
Interior Gateway Routing Protocol (IGRP)
IGRP Timers
Configuring IGRP Routing
Configuring IGRP in Our Internetwork
2621A
25O1A
25O1B
25O1C
Verifying the IGRP Routing Tables
Verifytng Your Configurations
The Show ProtOcois Command
The Show IP ProtOcol Command
The Debug IP RIP Command
The Debug IP IGRP Command
Summary
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab 5 1: Creatlng Statlc Routes
Lab 52: Dynamlc Routing with RIP
Lab 53: Dynamic Routing with IGRP
Review guestlons
Answers to the Written Lab
Answers to Review guestions
Chapter 6 Vlrtual ams (Vtws)
Virtual LANs
Broadcast Control
OCCUllLy
Flexibility and Scalability
M Memberships
Static VLANs
Dynamic VLANs
Identifytng VLANs
Frame Tagging
W Identification Methods
Inter--Switch Link (ISL) Protocol
Trunking
Routing betWeen VLANs
W Trunk Protocol (VfP)
W Modes of Operation
Configuration Revision Number
VTP Pruning
Summary
Key Terms
Written Lab
Review guestions
AnQwers to the Written Lab
Answers to Review guestions
Chapter 7 Managing a Cisco Intemetwork
The Internal Components of a Cisco Router
The Router Boot Sequence
Managing tonfiguration Registers
Understanding the Configuration Register Bits
Checking the Current Configuration Register V
Changing the Configuration Register
Recovering Passwords
Backing Up and Restoring the Cisco IOS
Verifying Flash Memory
Backing Up the Cisco IOS
Restoring or Upgrading the Cisco Router IOS
Backing Up and Restoring the Cisco Configuratior
Backing Up the Cisco Router Configuration
Restoring the Cisco Router Configuration
Erasing the Configuration
Using Cisco Discovery Protocol
Getting CDP Timers and Holdtime Information
Getting Neighbor Information
U V L8 111LVl 1UVV l 1 U1l1V 11l1U1 l11OLlU11
Getting Port and Interface InfOrmation
Using Telnet
Telnetting into Multiple Devices Simultaneously
Checking Telnet Connections
Checking Telnet Users
Closing Telnet Sessions
Resolving Hostnames
Building a Host Table
Using DNS to Resolve Names
Checking Network Connectivity
Using the nng Command
Using the Troce Command
Summary
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab 7 l: Backing Up Your Router IOS
Lab 72: Upgrading or Restoring YOur Router IOS
Lab 73: Backing Up the Router Configuration
Lab 74: Using the Cisco Discovery Protocol (CDF
Lab 75: Using Telnet
Lab 76: Resolving Hostnames
Review guestions
Answers to the Written Lab
Answers to Review guestions
chapter 8 coufiguring Noven 1PX
Introduction to Novell IPX
Novell IPX Protocol Stack
Client--Server Communication
Soerver--Server Communication
IPX Addressing-
Encapsulation
Enabling IPX on Cisco Routers
Enabling IPX Routing
Enabling IPX on Individual Interfaces
Configuring Our Internetwork with IPX
Configuring IPX on the 262lA Router
Configuring IPX on the 25O lA Router
Uonliguring 1Fx on tne LDu 1o rtuuLCl
Configuring IPX on the 25O lC Router
Verifying the IPX Routing Tables
Adding Secondary Addresses
Configuring Secondary Addresses
Subinterfaces
Configuring Our IntemetWork with
Multiple Ethernet Frame bees
Configuring Multiple Frame toes on the 2621P
Configuring Multiple Frame bees on the 25O1P
Configuring Multiple Frame Whes on the 25O1F
Configuring Multiple Frame Whes on the 25O 1<
Verifying the IPX Routing Tables
Monitoring IPX on Cisco Routers
Show IPX Servers
Show IPX RoutC
Show IPX Trthe
chow IPX IntCrfaces
ohow IPX IntCdeces
Show PTOtocols
DebUg IPX
Rout8rA#IPX Ping
Soummary
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab 8 l: Configuring InternetwOrking Packet E:
Lab 82: Adding Secondary NetwOrk Addresses
Multiple Frame bees with IPX
Review guestions
Answers to the Written Lab
Answer to Review Questions
Chapter 9 Managing Traffic with Access Lists
Access Lists
Standard IP Access Lists
Controlling VTY (Telnet) Access
Extended IP Access Lists
Monitoring IP Access Lists
IPX Access Lists
Standard IPX Access Lists
Mtx-vxxuvu 11 xx 11vvVOO AnlOLO
Iry SAn Filters
Verifying IPX Access Lists
Summary
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab 9 1: Standard IP Access Lists
Lab 92: Extended IP Access Lists
Lab 93: Standard IPX Access Lists
Review guestions
Answers to the Written Lab
Answers to Review guestions
Chapter 1O wide Axea Networking Protocols
Wide Area Networks
Defining WAN Terms
W Connection bees
WAN Support
High--Level Data-Link Control Protocol (HDLC)
Point--to-Point Protocol (PPP)
Link Control Protocol (LCP) Configuration Option
PPP Session Establishment
PPP Autheritication Methods
Configuring PPP on Cisco Routers
Configuring PPP Authentication
Verifying PPP Encapsulation
Frame Relay
Frame Relay Terminology
Frame Relay Encapsulation
Data Link Connection Identifiers (DLCIs)
Local Management Interface (LMI)
Subinterfaces
Mapping Frame Relay
Frame Relay Congestion Control
Committed InfOrmation Rate (CIR)
Monitoring Frame Relay
Integrated Services Digital Network (ISDN)
ISDN Components
Basic Rate Interface (BRl)
Primary Rate Interface (PRI)
ISDN with Cisco Routers
Dial-on--Demand Routing (DDR)
Configuring DDR
Configuring Static Routes
Spec1fying Interesting Traffic
Configuring the Dialer InfOrmation
Optional Commands
DDR with Access Lists
Verifying the ISDN Operation
Summary 
Key Terms
Commands in This Chapter
Written Lab
Hands--on Labs
Lab lO l: Configuring PPP Encapsulation and A1
Lab lO2: Configuring arid Monitoring HDLC
Lab lO3: Configuring Frame Relay and Subintel
Lab 1O4: Configuring ISDN and BRI Interfaces
Review guestions
Answers to the Written Lab
Answers to Review guestions
Appendix A Practice Exam
guestions to the Practice Exam
Answers to the Practice Exam
APpendix B connguring the catalyst 19oo switcb
Features of the l9OO Switch
The Three Configuration Options
Connecting to the Console Port
l9OO Switch Startup
Connecting to an Ethernet Port
Cisco 19OO IOS Configuration Commands
Q
oetting the Passwords
q
oetting the Hostname
Q
oetting IP InfOrmatiofl
Configuring Switch Interfaces
Configuring Interface Descriptions
Configuring the Port Duplex
Verifying IP Connectivity
Erasing the Switch Configuratlon
Managing the MAC Address Table
Setting Permanent and Static MAC Addresses
Configuring Port Security
Using the Show VerstOn Command
Changing the LAN Switch twe
Configuring ws
Assigning Switch Ports to VLANs
Configuring Trunk Ports
Clearing VLANs from Trunk Links
Verifying Trunk Links
Configuring ISL Routing
Configuring VTP-
Configuring the Domain
Adding to a VTP Domain
W Pruning
Restoring or Upgrading the Catalyst 19OO IOS
Backing Up and Restoring the Catalyst l9OO Co
CDP with the 19OO Switch
Summary
Key Terms
Commands in This Appendix
Written Lab
Hands-on Labs
Lab B 1: Managing the 19OO Switch
Lab B2: l9OO Switch Operations
Lab B3: Creating Ws
Lab B4: Assigning VLANs to Switch Ports
Lab B5: Configuring Trunking
Lab B6: Configuring VTP
Lab B7: Configuring Iriter--M Routing with 
Review guestions
Answers to the Written Lab
Answers to Review guestions
APpendIn C Commauds iu This Study Guide
Glossary