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CCNA Cisco Certified Network Associate Study Guide, 7th Edition

ISBN: 978-0-470-90107-6
864 pages
April 2011
CCNA Cisco Certified Network Associate Study Guide, 7th Edition (0470901071) cover image


Learn from the Best - Cisco Networking Authority Todd Lammle

Written by Cisco networking authority Todd Lammle, this comprehensive guide has been completely updated to reflect the latest CCNA 640-802 exam. Todd’s straightforward style provides lively examples, hands on and written labs, easy-to-understand analogies, and real-world scenarios that will not only help you prepare for the exam, but also give you a solid foundation as a Cisco networking professional.

This Study Guide teaches you how to

  • Describe how a network works
  • Configure, verify and troubleshoot a switch with VLANs and interswitch communications
  • Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network.
  • Configure, verify, and troubleshoot basic router operation and routing on Cisco devices
  • Explain and select the appropriate administrative tasks required for a WLAN
  • Identify security threats to a network and describe general methods to mitigate those threats
  • Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network.
  • Implement and verify WAN links

On the CD-ROM:

  • Chapter Review Questions
  • Full-Length Practice Exams
  • Electronic Flashcards

·         Exclusive CD-only bonus material, including the CCNA Simulation Exam Practice Guide

  • All new Audio and Video Instruction from Todd Lammle

Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

For Instructors: Teaching supplements are available for this title.

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Table of Contents

Introduction xxiii

Assessment Test xxxii

Chapter 1 Internetworking 1

Chapter 2 Review of Ethernet Networking and Data Encapsulation 41

Chapter 3 Introduction to TCP/IP 83

Chapter 4 Easy Subnetting 135

Chapter 5 Variable Length Subnet Masks (VLSMs), Summarization, and Troubleshooting TCP/IP 175

Chapter 6 Cisco’s Internetworking Operating System (IOS) 205

Chapter 7 Managing a Cisco Internetwork 277

Chapter 8 IP Routing 345

Chapter 9 Enhanced IGRP (EIGRP) and Open Shortest Path First (OSPF) 427

Chapter 10 Layer 2 Switching and Spanning Tree Protocol (STP) 503

Chapter 11 Virtual LANs (VLANs) 557

Chapter 12 Security 607

Chapter 13 Network Address Translation (NAT) 655

Chapter 14 Cisco’s Wireless Technologies 683

Chapter 15 Internet Protocol Version 6 (IPv6) 715

Chapter 16 Wide Area Networks 741

Index 803

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Author Information

Todd Lammle, CCSI, CCNA/CCNA Wireless/CCNP/CCSP/CCVP, MCSE, CEH/CHFI, FCC RF Licensed, is the authority on Cisco Certification internetworking. He is a world-renowned author, speaker, trainer, and consultant. Todd has over 29 years of experience working with LANs, WANs, and large licensed and unlicensed wireless networks. He has also published over 50 books, including the very popular Sybex CCNA Study Guides and CCNA Wireless Study Guide. He runs a training and consulting company based in Colorado and Texas. You can reach Todd through his forum and blog at
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Do you think you've discovered an error in this book? Please check the list of errata below to see if we've already addressed the error. If not, please submit the error via our Errata Form. We will attempt to verify your error; if you're right, we will post a correction below.

ChapterPageDetailsDatePrint Run
1 36 Text correction: Incorrect answer for Review Question 9
The correct answers are B and C. The explanation should read:
"Every port on a switch creates a collision domain, which provides more bandwidth for users."
6/3/11 1st
2 45 Text correction: Use of full-duplex Ethernet
There are six situations given in the bulleted list, not five as the preceding sentence states.
The fourth bullet point, "With a connection from a switch to a router using a crossover cable" is incorrect. Delete "using a crossover cable".
6/3/11 1st
3 124 Text correction: Incorrect multicast address
Under Multicast Address, the second paragraph, fourth sentence, contains an error. The address given,, is incorrect.
It should read:
6/10/11 1st and 2nd
4 173 Text correction: Answers to Written Lab 4.3
The number of hosts for (fourth row, last column) is incorrect.
"16,384" should read "16,382"
8/22/11 1st-3rd
5 181 Correction: Error in Figure 5.4
The upper right router in the figure, labeled "Lab E" (with an address ending in 64/27) should be labeled "Lab C".
8/17/11 1st and 2nd
5 182 Text correction: Errors in Figure 5.5
The addresses given in the chart starting with 192.16.10 are incorrect.
All addresses in the chart should begin with 192.168.10

The Class C Network table at the bottom left duplicates the above error and should have an address listed of
In addition, incorrect hosts are given in the Class C Network table for networks A,B,C and D. Change hosts 12, 20, 25 and 4 to 14, 30, 20, 6, as follows:
Network Hosts
A 14
B 30
C 20
D 6
6/10/11 1st and 2nd
5 189 Error in Number
paragraph 1, last sentence:
"...anything in common with all six:"

should be:
"...anything in common with all five:"

It's referring to the number of bullet points listed directly below it. There are only five, not six.
10/18/11 1st-3rd
5 198 Text correction: Errors In Written Lab 5
Question 2. should read through The answer should read

Question 4. should read through

The answer to 5. should read

The answer to 6. should read

UPDATED at third reprint 8/22/11:
(This applies to the 3rd printing as well as the 1st and 2nd)
The answer to 7. should read
6/10/11 1st and 2nd
6 271 Text correction: Errors in options for Review Question 12.
Option B should read:

SFRouter(config)#line console 0
SFRouter(config-line)#enable secret password

Option D should read:

SFRouter(config)#line vty 0 4
SFRouter(config-line)#password password
10/8/12 1st-3rd
6 275 Text correction: Error in answer to Written Lab 6, Question 1.
The answer should read:
router(config-if)#clock rate 64000
9/22/11 1st-3rd
6 275 Text correction: Errors in Answers to Written Lab 6, Question 5
The answer to Question 5 in the Written Lab contains several errors. It should read:

router#config t
router(config)# line console 0
router(config-line)# password todd
router(config-line)# login
10/10/12 1st-3rd
6 275 Text correction: Error in answer to Written Lab 6, Question 7.
The answer to question 7. should read:
"router#show controllers serial 0/2"
8/25/11 1st-3rd
8 366 Text correction: Error in R1 Configuration routing command
After the routing table, a command is given that reads R1#
That command should read R1#ping
6/10/11 1st and 2nd
8 371 Text correction: Error in DHCP configuration
The third line, "R3(dhcp-config)#ip name-server"
misidentifies the server and gives the wrong address. It should read:

11/4/11 1st-3rd
8 385 Text correction: Error in routing table output
The first line of the table, "R [120/1] via 101.2.2, 00:00:00, Serial 0/0" should read:

"R [120/1] via, 00:00:00, Serial 0/0"
7/9/12 1st-3rd
8 425 Text correction: Error in answer to Written Lab 8, Question 1.
The answer to question 1. should read:
"router(config)#ip route 150"
8/25/11 1st and 2nd
9 454 Text correction: Error in Table 9.3
Under "RIPv2" the entry for "Manual summarization" should be "Yes".
12/1/11 1st-3rd
9 465 Text correction: Incorrect network statement
Under "R2", the first network statement (line 5), " area 0 is incorrect.
It should read: "" area 0
6/14/11 1st and 2nd
9 472 Text correction: Error in Table 9.4
The first entry under "Description/Function", "Shows Hello packets being sent and received on your router" should read:
"Shows Hello packets being received on your router"
6/14/11 1st and 2nd
9 476 Text correction: Error in configuration of loopback interface
The last line on the page,
"R3(config-if)#ip address"
gives the wrong IP address. It should read:

"R3(config-if)#ip address"
11/4/11 1st-3rd
10 503 Text correction: Incorrect CCNA Exam Topic given in chapter opener
The second main topic given, "Configure, verify, and troubleshoot basic router operation and routing with Cisco devices" is not discussed in Chapter 10. The bullet points listed below it should be under the first topic, regarding switches.
12/1/11 1st-3rd
10 526 Text correction: Typographical error
The second paragraph under "EtherChannel" contains an error. The first sentence, "...there's the Cisco version of EtherChannel and the IEEE version of port channel negation protocols to choose from..." should read:
"...port channel negotiation protocols..."
12/1/11 1st-3rd
10 531 Text correction: Incorrectly identified port in Core switch configuration
The seventh line in the configuration, "Core(config)#int fa0/5"
should read:
"Core(config)#int f0/6"
9/9/11 1st-3rd
13 658 Text correction: Error in Table 13.2 NAT terms
The entries for Inside global and Outside global are reaversed; Inside global is the name of the outside destination host before translation, and Outside global is the name of the destination host after translation.
8/29/13 1st-4th
13 661 Text correction: Error under Dynamic NAT Configuration
The last sentence,
"The ip nat pool todd"
should read:
"The ip nat pool todd"
9/27/12 1st-3rd
13 675 Text correction: Errors in router output
In step 6. The location IP addresses in the output, given as and, are incorrect.
Both location IP addresses should be
6/14/11 1st-3rd
13 680 Text correction: Errors in explanation for Answer to Question 14
D is the correct answer. Change the end of the second sentence in the explanation to read: "...our block size is 8 in the third octet, or 21."
6/14/11 1st and 2nd
15 726 Text correction
The last sentence on the page contains an error. It should read:
"...with the biggest difference being that it uses the router interface itself instead of using the network command..."
6/15/11 1st and 2nd
CD CD Combined CD corrections
Assessment Test
Question 31.
The options are incomplete. The Assessment Test in the printed book has the correct options. They are as follows:

  1. RouterA(config)#bandwidth 64
  2. RouterA(config-if)#bandwidth 64000
  3. RouterA(config)#clockrate 64000
  4. RouterA(config-if)#clock rate 64
  5. RouterA(config-if)#clock rate 64000
The answer and explanation are correct.

Practice Exam 1
Question 5.
The options are incomplete. They should read as follows:

  1. Router#copy tftp dram
  2. Router#copy tftp flash
  3. Router#copy tftp running-config
  4. Router#copy tftp startup-config
The answer and explanation are correct.

Question 37.
Options B and D are the same answer. Change Option D to read "Router(config-if)#bandwidth 560,000"
6/16/11 1st and 2nd
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Instructors Resources
Wiley Instructor Companion Site
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