Cart
Free Shipping in the UK
Proud to be B-Corp

CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) Wendell Odom

CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) By Wendell Odom

CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) by Wendell Odom


£3.50
New RRP £28.49
Condition - Very Good
Only 1 left

Summary

Readers can master ICND2 640-816 and CCNA 640-802 exam topics with this official study guide that reviews key concepts with exam preparation tasks with hundreds of questions.

CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) Summary

CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) by Wendell Odom

New Edition of Best Selling Official Cert Guide Available

Includes Updated Content, New Exercises, and Expanded Coverage -- PLUS includes CCNA Network Simulator Lite Edition.

The new edition of bestselling Official Cert Guide is available: CCNA ICND2 640-816 Official Cert Guide, Third Edition (ISBN: 978-1-58720-435-7) by Wendell Odom has been updated to refresh the content, add new exercises, and enhance certain topics that are key to understanding for success on the CCNA exams. Chapters on VLSM, route summarization, and IP access control lists have been completely revised. In addition the book contains new practice exercises for all three of these topics to help reinforce the concepts and increase computation speed for exam preparation.

CCNA ICND2 640-816 Official Cert Guide, 3rd Edition
ISBN: 978-1-58720-435-7

About the Previous Edition - Now Out of Print

CCNA ICND2 Official Exam Certification Guide, Second Edition, is a best of breed Cisco (R) exam study guide that focuses specifically on the objectives for the CCNA (R) ICND2 exam. This fully updated edition presents complete reviews and a more challenging and realistic exam preparation experience.

Senior instructor and best-selling author Wendell Odom shares preparation hints and test-taking tips, helping you identify areas of weakness and improve both your conceptual knowledge and hands-on skills. The material is presented in a concise manner, focused on increasing your understanding of exam topics and preparing you for the numerous challenges the exams present.

CCNA ICND2 Official Exam Certification Guide, Second Edition, presents you with an organized test preparation routine through the use of proven series elements and techniques. "Do I Know This Already?" quizzes open each chapter and allow you to decide how much time you need to spend on each section. Chapter-ending Exam Preparation Tasks sections help you drill on key concepts you must know thoroughly and help increase your speed in answering questions, a difficult hurdle many exam candidates face on the new exams. A Final Preparation chapter guides you through tools and resources to help you craft your final study plan. Special troubleshooting sections help you master the complex scenarios you will face on the exam.

The companion CD-ROM contains a powerful testing engine that allows you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback on a chapter-by-chapter basis, presenting question-by-question remediation to the text. The bonus DVD contains more than 60 minutes of personal video mentoring from the author focused mainly on bringing difficult subnetting concepts to life.

Well-regarded for its level of detail, assessment features, and challenging practice questions, this book provides you with more detailed information and more realistic practice exercises than any other CCNA study guide, enabling you to succeed on the exam the first time.

CCNA ICND2 Official Exam Certification Guide, Second Edition, is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining.

Wendell Odom, CCIE (R) No. 1624, has been in the networking industry since 1981. He currently teaches QoS, MPLS, and CCNA courses for Skyline Advanced Technology Services (www.skyline-ats.com). Wendell has worked as a network engineer, consultant, systems engineer, and instructor and course developer, and has taught authorized Cisco courses for the majority of the last 14 years.

The official study guide helps you master all the topics on the CCNA ICND2 exam, including

  • Virtual LANs and Spanning Tree Protocol
  • Static and connected routes
  • VLSM and route summarization
  • IP access control lists
  • OSPF and EIGRP configuration
  • Point-to-point WANs
  • Frame Relay
  • VPNs
  • Network address translation
  • IPv6
  • Troubleshooting

Companion CD-ROM

The CD-ROM contains an electronic copy of the book and 200 practice questions for the ICND2 and full CCNA exams, including simulation and testlet questions, all available in study mode and test mode.

BONUS DVD

The DVD contains more than 60 minutes of personal instruction from the author!

This volume is part of the Exam Certification Guide Series from Cisco Press (R). Books in this series provide officially developed exam preparation materials that offer assessment, review, and practice to help Cisco Career Certification candidates identify weaknesses, concentrate their study efforts, and enhance their confidence as exam day nears.

About Wendell Odom

Wendell Odom, CCIE No. 1624, has been in the networking industry since 1981. He currently teaches QoS, MPLS, and CCNA courses for Skyline Advanced Technology Services (http://www.skyline-ats.com). Wendell also has worked as a network engineer, consultant, and systems engineer, and as an instructor and course developer. He is the author of all prior editions of CCNA Exam Certification Guide, as well as the Cisco QoS Exam Certification Guide, Second Edition, Computer Networking First-Step, CCIE Routing and Switching Official Exam Certification Guide, Second Edition, and CCNA Video Mentor, all from Cisco Press.

Table of Contents

Foreword

Introduction

Part I: LAN Switching

Chapter 1 Virtual LANs

"Do I Know This Already?" Quiz 5

Foundation Topics 9

Virtual LAN Concepts

Trunking with ISL and 802.1Q

ISL

IEEE 802.1Q

ISL and 802.1Q Compared

IP Subnets and VLANs

VLAN Trunking Protocol (VTP)

Normal VTP Operation Using VTP Server and Client Modes

Three Requirements for VTP to Work Between Two Switches

Avoiding VTP by Using VTP Transparent Mode

Storing VLAN Configuration

VTP Versions

VTP Pruning

Summary of VTP Features

VLAN and VLAN Trunking Configuration and Verification

Creating VLANs and Assigning Access VLANs to an Interface

VLAN Configuration Example 1: Full VLAN Configuration

VLAN Configuration Example 2: Shorter VLAN Configuration

VLAN Trunking Configuration

Controlling Which VLANs Can Be Supported on a Trunk

Trunking to Cisco IP Phones

Securing VLANs and Trunking

VTP Configuration and Verification

Using VTP: Configuring Servers and Clients

Caveats When Moving Away from Default VTP Configuration

Avoiding VTP: Configuring Transparent Mode

Troubleshooting VTP

Determining Why VTP Is Not Currently Working

Problems When Connecting New Switches and Bringing Up Trunks

Avoiding VTP Problems Through Best Practices

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 2 Spanning Tree Protocol

"Do I Know This Already?" Quiz

Foundation Topics

Spanning Tree Protocol (IEEE 802.1d)

The Need for Spanning Tree

What IEEE 802.1d Spanning Tree Does

How Spanning Tree Works

The STP Bridge ID and Hello BPDU

Electing the Root Switch

Choosing Each Switch's Root Port

Choosing the Designated Port on Each LAN Segment

Reacting to Changes in the Network

Optional STP Features

EtherChannel

PortFast

STP Security

Rapid STP (IEEE 802.1w)

RSTP Link and Edge Types

RSTP Port States

RSTP Port Roles

RSTP Convergence

Edge-Type Behavior and PortFast

Link-Type Shared

Link-Type Point-to-Point

An Example of Speedy RSTP Convergence

STP Configuration and Verification

Multiple Instances of STP

Configuration Options That Influence the Spanning Tree Topology

The Bridge ID and System ID Extension

Per-VLAN Port Costs

STP Configuration Option Summary

Verifying Default STP Operation

Configuring STP Port Costs and Switch Priority

Configuring PortFast and BPDU Guard

Configuring EtherChannel

Configuring RSTP

STP Troubleshooting

Determining the Root Switch

Determining the Root Port on Nonroot Switches

Determining the Designated Port on Each LAN Segment

STP Convergence

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 3 Troubleshooting LAN Switching

"Do I Know This Already?" Quiz

Foundation Topics

Generalized Troubleshooting Methodologies

Analyzing and Predicting Normal Network Operation

Data Plane Analysis

Control Plane Analysis

Predicting Normal Operations: Summary of the Process

Problem Isolation

Root Cause Analysis

Real World Versus the Exams

Troubleshooting the LAN Switching Data Plane

An Overview of the Normal LAN Switch Forwarding Process

Step 1: Confirm the Network Diagrams Using CDP

Step 2: Isolate Interface Problems

Interface Status Codes and Reasons for Nonworking States

The notconnect State and Cabling Pinouts

Interface Speed and Duplex Issues

Step 3: Isolate Filtering and Port Security Problems

Step 4: Isolate VLAN and Trunking Problems

Ensuring That the Right Access Interfaces Are in the Right VLANs

Access VLANs Not Being Defined or Being Active

Identify Trunks and VLANs Forwarded on Those Trunks

Example: Troubleshooting the Data Plane

Step 1: Verify the Accuracy of the Diagram Using CDP

Step 2: Check for Interface Problems

Step 3: Check for Port Security Problems

Step 4: Check for VLAN and VLAN Trunk Problems

Predicting Normal Operation of the LAN Switching Data Plane

PC1 Broadcast in VLAN 1

Forwarding Path: Unicast from R1 to PC1

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Part II: IP Routing

Chapter 4 IP Routing: Static and Connected Routes

"Do I Know This Already?" Quiz

Foundation Topics

IP Routing and Addressing

IP Routing

IP Addressing and Subnetting

IP Forwarding by Matching the Most Specific Route

DNS, DHCP, ARP, and ICMP

Fragmentation and MTU

Routes to Directly Connected Subnets

Secondary IP Addressing

Supporting Connected Routes to Subnet Zero

ISL and 802.1Q Configuration on Routers

Static Routes

Configuring Static Routes

The Extended ping Command

Static Default Routes

Default Routes Using the ip route Command

Default Routes Using the ip default-network Command

Default Route Summary

Classful and Classless Routing

Summary of the Use of the Terms Classless and Classful

Classless and Classful Routing Compared

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 5 VLSM and Route Summarization

"Do I Know This Already?" Quiz

Foundation Topics

VLSM

Classless and Classful Routing Protocols

Overlapping VLSM Subnets

Designing a Subnetting Scheme Using VLSM

Adding a New Subnet to an Existing Design

VLSM Configuration

Manual Route Summarization

Route Summarization Concepts

Route Summarization Strategies

Sample "Best" Summary on Seville

Sample "Best" Summary on Yosemite

Autosummarization and Discontiguous Classful Networks

An Example of Autosummarization

Discontiguous Classful Networks

Autosummarization Support and Configuration

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Read Appendix F Scenarios

Command Reference to Check Your Memory

Chapter 6 IP Access Control Lists

"Do I Know This Already?" Quiz

Foundation Topics

Standard IP Access Control Lists

IP Standard ACL Concepts

Wildcard Masks

A Quicker Alternative for Interpreting Wildcard Masks

Standard IP Access List Configuration

Standard IP ACL: Example 1

Standard IP ACL: Example 2

Extended IP Access Control Lists

Extended IP ACL Concepts

Matching TCP and UDP Port Numbers

Extended IP ACL Configuration

Extended IP Access Lists: Example 1

Extended IP Access Lists: Example 2

Advances in Managing ACL Configuration

Named IP Access Lists

Editing ACLs Using Sequence Numbers

Miscellaneous ACL Topics

Controlling Telnet and SSH Access with ACLs

ACL Implementation Considerations

Reflexive Access Lists

Dynamic ACLs

Time-Based ACLs

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Read the Appendix F Scenarios

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 7 Troubleshooting IP Routing

"Do I Know This Already?" Quiz

Foundation Topics

The ping and traceroute Commands

Internet Control Message Protocol (ICMP)

The ping Command and the ICMP Echo Request and Echo Reply

The Destination Unreachable ICMP Message

The Redirect ICMP Message

The ICMP Time Exceeded Message

The traceroute Command

Troubleshooting the Packet Forwarding Process

Isolating IP Routing Problems Related to Hosts

Isolating IP Routing Problems Related to Routers

Troubleshooting Scenario 1: Forward Route Problem

Troubleshooting Scenario 2: Reverse Route Problem

An Alternative Problem Isolation Process for Steps 3, 4, and 5

Troubleshooting Tools and Tips

Host Routing Tools and Perspectives

Host Troubleshooting Tips

LAN Switch IP Support

show ip route Reference

Interface Status

VLSM Issues

Recognizing When VLSM Is Used

Configuring Overlapping VLSM Subnets

Symptoms with Overlapping Subnets

VLSM Troubleshooting Summary

Discontiguous Networks and Autosummary

Access List Troubleshooting Tips

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Part III: Routing Protocols Configuration and Troubleshooting

Chapter 8 Routing Protocol Theory

"Do I Know This Already?" Quiz

Foundation Topics

Dynamic Routing Protocol Overview

Routing Protocol Functions

Interior and Exterior Routing Protocols

Comparing IGPs

IGP Routing Protocol Algorithms

Metrics

IGP Comparisons: Summary

Administrative Distance

Distance Vector Routing Protocol Features

The Concept of a Distance and a Vector

Distance Vector Operation in a Stable Network

Distance Vector Loop Prevention

Route Poisoning

Problem: Counting to Infinity over a Single Link

Split Horizon

Poison Reverse and Triggered Updates

Problem: Counting to Infinity in a Redundant Network

The Holddown Process and Holddown Timer

Distance Vector Summary

Link-State Routing Protocol Features

Building the Same LSDB on Every Router

Applying Dijkstra SPF Math to Find the Best Routes

Convergence with Link-State Protocols

Summary and Comparisons to Distance Vector Protocols

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 9 OSPF

"Do I Know This Already?" Quiz

Foundation Topics

OSPF Protocols and Operation

OSPF Neighbors

Identifying OSPF Routers with a Router ID

Meeting Neighbors by Saying Hello

Potential Problems in Becoming a Neighbor

Neighbor States

OSPF Topology Database Exchange

Overview of the OSPF Database Exchange Process

Choosing a Designated Router

Database Exchange

Maintaining the LSDB While Being Fully Adjacent

Summary of Neighbor States

Building the IP Routing Table

Scaling OSPF Through Hierarchical Design

OSPF Areas

OSPF Area Design Advantages

OSPF Configuration

OSPF Single-Area Configuration

OSPF Configuration with Multiple Areas

Configuring the OSPF Router ID

OSPF Hello and Dead Timers

OSPF Metrics (Cost)

OSPF Authentication

OSPF Load Balancing

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 10 EIGRP

"Do I Know This Already?" Quiz

Foundation Topics

EIGRP Concepts and Operation

EIGRP Neighbors

Exchanging EIGRP Topology Information

Calculating the Best Routes for the Routing Table

Feasible Distance and Reported Distance

Caveats with Bandwidth on Serial Links

EIGRP Convergence

EIGRP Successors and Feasible Successors

The Query and Reply Process

EIGRP Summary and Comparisons with OSPF

EIGRP Configuration and Verification

Basic EIGRP Configuration

EIGRP Metrics, Successors, and Feasible Successors

Creating and Viewing a Feasible Successor Route

Convergence Using the Feasible Successor Route

EIGRP Authentication

EIGRP Maximum Paths and Variance

Tuning the EIGRP Metric Calculation

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 11 Troubleshooting Routing Protocols

"Do I Know This Already?" Quiz

Foundation Topics

Perspectives on Troubleshooting Routing Protocol Problems

Interfaces Enabled with a Routing Protocol

EIGRP Interface Troubleshooting Example

OSPF Interface Troubleshooting Example

Neighbor Relationships

EIGRP Neighbor Requirements

OSPF Neighbor Requirements

OSPF Neighbor Example 1

OSPF Neighbor Example 2

The MTU Matching Requirement

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Command Reference to Check Your Memory

Part IV: Wide-Area Networks

Chapter 12 Point-to-Point WANs

"Do I Know This Already?" Quiz

Foundation Topics

PPP Concepts

The PPP Protocol Field

PPP Link Control Protocol (LCP)

Looped Link Detection

Enhanced Error Detection

PPP Multilink

PPP Authentication

PPP Configuration

Basic PPP Configuration

CHAP Configuration and Verification

PAP Configuration

Troubleshooting Serial Links

Troubleshooting Layer 1 Problems

Troubleshooting Layer 2 Problems

Keepalive Failure

PAP and CHAP Authentication Failure

Troubleshooting Layer 3 Problems

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 13 Frame Relay Concepts

"Do I Know This Already?" Quiz

Foundation Topics

Frame Relay Overview

Frame Relay Standards

Virtual Circuits

LMI and Encapsulation Types

Frame Relay Addressing

Frame Relay Local Addressing

Frame Relay Global Addressing

Network Layer Concerns with Frame Relay

Frame Relay Layer 3 Addressing: One Subnet Containing All Frame Relay DTEs

Frame Relay Layer 3 Addressing: One Subnet Per VC

Frame Relay Layer 3 Addressing: Hybrid Approach

Layer 3 Broadcast Handling

Controlling Speed and Discards in the Frame Relay Cloud

FECN and BECN

The Discard Eligibility (DE) Bit

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Chapter 14 Frame Relay Configuration and Troubleshooting

"Do I Know This Already?" Quiz

Foundation Topics

Frame Relay Configuration and Verification

Planning a Frame Relay Configuration

A Fully Meshed Network with One IP Subnet

Configuring the Encapsulation and LMI

Frame Relay Address Mapping

Inverse ARP

Static Frame Relay Mapping

A Partially Meshed Network with One IP Subnet Per VC

Assigning a DLCI to a Particular Subinterface

Comments About Global and Local Addressing

Frame Relay Verification

A Partially Meshed Network with Some Fully Meshed Parts

Frame Relay Troubleshooting

A Suggested Frame Relay Troubleshooting Process

Layer 1 Issues on the Access Link (Step 1)

Layer 2 Issues on the Access Link (Step 2)

PVC Problems and Status (Step 3)

Find the Connected Subnet and Outgoing Interface (Steps 3a and 3b)

Find the PVCs Assigned to That Interface (Step 3c)

Determine Which PVC Is Used to Reach a Particular Neighbor (Step 3d)

PVC Status

Subinterface Status

Frame Relay Mapping Issues (Step 4)

End-to-End Encapsulation (Step 5)

Mismatched Subnet Numbers (Step 6)

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Read the Appendix F Scenarios

Command Reference to Check Your Memory

Chapter 15 Virtual Private Networks

"Do I Know This Already?" Quiz

Foundation Topics

VPN Fundamentals

IPsec VPNs

IPsec Encryption

IPsec Key Exchange

IPsec Authentication and Message Integrity

The ESP and AH Security Protocols

IPsec Implementation Considerations

SSL VPNs

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Part V: Scaling the IP Address Space

Chapter 16 Network Address Translation

"Do I Know This Already?" Quiz

Foundation Topics

Perspectives on IPv4 Address Scalability

CIDR

Route Aggregation for Shorter Routing Tables

IPv4 Address Conservation

Private Addressing

Network Address Translation Concepts

Static NAT

Dynamic NAT

Overloading NAT with Port Address Translation (PAT)

Translating Overlapping Addresses

NAT Configuration and Troubleshooting

Static NAT Configuration

Dynamic NAT Configuration

NAT Overload (PAT) Configuration

NAT Troubleshooting

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Chapter 17 IP Version 6

"Do I Know This Already?" Quiz

Foundation Topics

Global Unicast Addressing, Routing, and Subnetting

Global Route Aggregation for Efficient Routing

Conventions for Representing IPv6 Addresses

Conventions for Writing IPv6 Prefixes

Global Unicast Prefix Assignment Example

Subnetting Global Unicast IPv6 Addresses Inside an Enterprise

Prefix Terminology

IPv6 Protocols and Addressing

DHCP for IPv6

IPv6 Host Address Assignment

The IPv6 Interface ID and EUI-64 Format

Static IPv6 Address Configuration

Stateless Autoconfiguration and Router Advertisements

IPv6 Address Configuration Summary

Discovering the Default Router with NDP

Learning the IP Address(es) of DNS Servers

IPv6 Addresses

Unicast IPv6 Addresses

Multicast and Other Special IPv6 Addresses

Summary of IP Protocols and Addressing

Configuring IPv6 Routing and Routing Protocols

IPv6 Routing Protocols

IPv6 Configuration

IPv6 Transition Options

IPv4/IPv6 Dual Stacks

Tunneling

Translating Between IPv4 and IPv6 with NAT-PT

Transition Summary

Exam Preparation Tasks

Review All the Key Topics

Complete the Tables and Lists from Memory

Definitions of Key Terms

Command Reference to Check Your Memory

Part VI: Final Preparation

Chapter 18 Final Preparation

Tools for Final Preparation

Exam Engine and Questions on the CD

Install the Software from the CD

Activate and Download the Practice Exam

Activating Other Exams

The Cisco CCNA Prep Center

Subnetting Videos, Reference Pages, and Practice Problems

Scenarios

Study Plan

Recall the Facts

Practice Subnetting

Build Troubleshooting Skills Using Scenarios

Use the Exam Engine

Choosing Study or Simulation Mode

Choosing the Right Exam Option

Summary

Part VII: Appendixes

Appendix A Answers to the "Do I Know This Already?" Quizzes

Chapter 1

Chapter 2

Chapter 4

Chapter 5

Chapter 6

Chapter 8

Chapter 9

Chapter 10

Chapter 12

Chapter 13

Chapter 14

Chapter 15

Chapter 16

Chapter 17

Appendix B Decimal to Binary Conversion Table

Appendix C ICND2 Exam Updates: Version 1.0

Glossary

Index

Part VIII: CD-Only

Appendix D Subnetting Practice

Appendix E Subnetting Reference Pages

Appendix F Additional Scenarios

Appendix G Video Scenario Reference

Appendix H ICND1 Chapter 12: IP Addressing and Subnetting

Appendix I ICND1 Chapter 17: WAN Configuration

Appendix J Memory Tables

Appendix K Memory Tables Answer Key

Appendix L ICND2 Open-Ended Questions

Additional information

GOR001650323
9781587201813
158720181X
CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802) by Wendell Odom
Used - Very Good
Hardback
Pearson Education (US)
2007-08-30
744
N/A
Book picture is for illustrative purposes only, actual binding, cover or edition may vary.
This is a used book - there is no escaping the fact it has been read by someone else and it will show signs of wear and previous use. Overall we expect it to be in very good condition, but if you are not entirely satisfied please get in touch with us

Customer Reviews - CCNA ICND2 Official Exam Certification Guide (CCNA Exams 640-816 and 640-802)