Acrc Exam Certification Guide

Clare Gough, Cisco Press

ISBN:0735700753, Edition: Har/Cdr, 1999-06

Price: $60.00

Table of Contents

Introduction
Overview of Certification and How to Succeed with This Book ~ xix
Cisco Certifications: Training Paths and Exams ~ xix
Certification Exams ~ xix
Certification Training Paths ~ xxi
A Few Words on the Various Cisco Certifications ~ xxiii
Objective of This Book ~ xxiv
Who Should Read This Book? ~ xxiv
Have You Mastered All the Exam Objectives? ~ xxiv
How This Book Is Organized ~ xxv
Approach ~ xxv
Features and Conventions of This Book ~ xxvi

Chapter 1
What Is ACRC? ~ 2
The ACRC Exam and CCNP and CCDP Certification ~ 3
Suggested Prior Preparation—Cisco Training Paths ~ 5
ACRC Exam Philosophy ~ 6
ACRC Exam Preparation ~ 7
Chapters Follow the Objectives ~ 7
Determining Your Strengths and Weaknesses ~ 7
Questions and Exercises That Are Harder Than the Actual Exam ~ 7
Scenarios for Final Preparation ~ 8
Simulated Testing on the CD-ROM ~ 8
The ACRC Exam Objectives ~ 8
List of the ACRC Exam Objectives ~ 8
Cross Reference to Objectives Covered in Each Chapter ~ 13
Where Do I Go from Here? ~ 13

Chapter 2
Managing Scalable Network Growth ~ 14
How to Best Use This Chapter ~ 15
“Do I Know This Already?” Quiz ~ 15
Introduction to Corporate Networks—Growth, Scalability, and Congestion ~ 19
Identifying the Problem of Network Congestion ~ 19
Problems Created by Network Congestion ~ 20
Symptoms of Congestion ~ 23
Applications Timeout ~ 23
Clients Cannot Connect to Network Resources ~ 23
Network Death ~ 24
Key Requirements of a Network ~ 24
Reliability ~ 25
Responsiveness ~ 25
Efficiency ~ 25
Adaptability ~ 25
Accessibility/Security ~ 25
Cisco’s Hierarchical Design ~ 26
Why Scaling Reduces Congestion ~ 26
How Hierarchical Is Hierarchical? ~ 26
The Functions of Each Layer ~ 27
General Design Rules for Each Layer ~ 28
Alleviating Congestion with Cisco Routers ~ 29
Managing Network Congestion for IP ~ 29
The Implementation of IP Access Lists ~ 30
IP Access Lists Reviewed ~ 30
Guidelines for Writing Access Lists ~ 31
Alternatives to Access Lists ~ 34
Null Interface ~ 34
Prioritization ~ 37
Security Using Access Lists ~ 38
Controlling Terminal Access ~ 38
Final Connectivity and CPU Considerations ~ 39
Placement of Client/Server ~ 40
IP Helper Address ~ 40
Uses of IP Access Lists ~ 41
x
Managing Network Access for IPX ~ 43
The Implementation of IPX Access Lists ~ 43
Uses of IPX Access Lists ~ 45
Other Issues ~ 50
Conclusion ~ 55
Scenario 2-1 ~ 62
Scenario 2-2 ~ 64
Scenario 2-3 ~ 64
Scenario 2-1 Answers ~ 65
Scenario 2-2 Answers ~ 66
Scenario 2-3 Answers ~ 67

Chapter 3
IP Addressing ~ 70
How to Best Use This Chapter ~ 71
“Do I Know This Already?” Quiz ~ 71
Introduction: What Is a Layer 3 Address and How Does It Affect My Life? ~ 75
What Is a Network Address? ~ 75
A Definition of a Layer 3 Network ~ 76
Network and Host Addressing ~ 78
The Internet Mask ~ 78
The Subnet Mask ~ 79
Prefix Routing ~ 82
Variable-Length Subnet Masks (VLSMs) ~ 86
Designing IP Networks ~ 100
Keys Points to Remember When Designing an IP Network ~ 102
Private Addresses on the Internet ~ 106
Connecting to the Outside World ~ 108
The Main Features of NAT ~ 110
Conclusion ~ 112
Scenario 3-1 ~ 116
Scenario 3-2 ~ 116
Scenario 3-3 ~ 118
Scenario 3-1 Answers ~ 119
Scenario 3-2 Answers ~ 123
Scenario 3-3 Answers ~ 125

Chapter 4
IP Routing Protocols ~ 128
How to Best Use This Chapter ~ 129
“Do I Know This Already?” Quiz ~ 129
Introduction: What Is a Routing Protocol? ~ 133
The Network Field ~ 134
The Outgoing Interface Field ~ 135
The Metric Field ~ 135
The Next Logical Hop Field ~ 135
How the Routing Table Is Kept Current and Correct ~ 136
Distance Vector and Link-State Routing Protocols ~ 136
RIP Version 1 ~ 139
OSPF ~ 140
Key Attributes of OSPF ~ 141
How OSPF Builds Its Routing Table ~ 146
The Link-State Advertisements ~ 148
The Topology Database ~ 150
Choosing the Shortest Path First and Building the Routing Table ~ 152
OSPF in a Multiple Area Network ~ 154
Why Multiple Areas? ~ 155
Scenario 4-1 ~ 165
Scenario 4-2 ~ 166
Scenario 4-3 ~ 166
Scenario 4-1 Answers ~ 168
Scenario 4-2 Answers ~ 168
Scenario 4-3 Answers ~ 169

Chapter 5
OSPF Configuration ~ 170
How to Best Use This Chapter ~ 171
“Do I Know This Already?” Quiz ~ 171
Configuring OSPF on a Single Cisco Router ~ 175
Required Commands for Configuring OSPF on an Internal Router ~ 175
Options for Configuring OSPF on an Internal Router ~ 178
A Working Configuration of OSPF on a Single Router ~ 180
Checking the Configuration of OSPF on a Single Router ~ 181
The show ip ospf Command ~ 182
The show ip ospf database Command ~ 184
The show ip ospf interface Command ~ 185
The show ip ospf neighbor Command ~ 188
The show ip protocol Command ~ 190
The show ip route Command ~ 192
Configuring OSPF on a Multiarea Network ~ 194
Configuration Commands for a Multiarea OSPF Network ~ 195
A Working Configuration of OSPF on a Multiarea Network ~ 197
Checking the Configuration of OSPF on a Multiarea Network ~ 199
The show ip ospf border-routers Command ~ 200
The show ip ospf virtual-links Command ~ 201
Conclusion ~ 202
Scenario 5-1 ~ 207
Scenario 5-2 ~ 208
Scenario 5-3 ~ 211
Scenario 5-1 Answers ~ 212
Scenario 5-2 Answers ~ 214
Scenario 5-3 Answers ~ 215

Chapter 6
EIGRP, BGP, and Redistribution ~ 218
How to Best Use This Chapter ~ 219
“Do I Know This Already?” Quiz ~ 219
Introduction: The Alternatives to the Complexity of OSPF in Large Enterprise
Networks ~ 223
Enhanced IGRP ~ 224
How Enhanced IGRP Works ~ 225
Configuring Enhanced IGRP ~ 239
The Required Commands for Configuring Enhanced IGRP ~ 240
The Optional Commands for Configuring Enhanced IGRP ~ 241
Configuring Enhanced IGRP for IPX ~ 244
Configuring Enhanced IGRP for AppleTalk ~ 246
Verifying the Enhanced IGRP Operation ~ 247
The show ip eigrp neighbors Command ~ 248
The show ip eigrp topology Command ~ 249
The show ip eigrp traffic Command ~ 251
Redistribution between Routing Protocols ~ 252
Controlling Routing Updates ~ 252
The Main Features of Redistribution ~ 254
Configuring Redistribution ~ 262
Redistribution Examples ~ 264
Verifying, Maintaining, and Troubleshooting the Redistribution Implementation ~ 270
Communicating to the Outside World—Border Gateway Protocol (BGP) ~ 271
What Is BGP? ~ 271
When to Use BGP4 ~ 272
When Not to Use BGP4 ~ 272
Overview of the BGP Operation ~ 272
Exterior BGP4 Configuration Commands to Connect to an ISP ~ 274
Managing and Verifying the BGP Configuration ~ 275
Alternative Methods of Connecting to an ISP ~ 275
Conclusion ~ 277
Scenario 6-1 ~ 284
Scenario 6-2 ~ 285
Scenario 6-3 ~ 286
Scenario 6-1 Answers ~ 288
Scenario 6-2 Answers ~ 289
Scenario 6-3 Answers ~ 291

Chapter 7
WAN Options: ISDN, DDR, and Configuration ~ 294
How to Best Use This Chapter ~ 295
“Do I Know This Already?” Quiz ~ 296
Introduction: The Alternatives Available in a WAN Environment ~ 299
WAN Connections: The Options Available ~ 299
WAN Connections: The Layer 2 Encapsulations Available ~ 301
Considerations When Selecting a WAN Connection Type ~ 302
ISDN and Dial-on-Demand Routing ~ 304
The Components of ISDN ~ 304
Commands for Configuring ISDN ~ 307
Configuring ISDN for DDR ~ 308
DDR for Dial Backup ~ 320
Advanced Options ~ 322
Configuring and Verifying Multilink PPP ~ 323
Snapshot Routing ~ 325
Queuing ~ 329
Conclusion ~ 335
Scenario 7-1 ~ 342
Scenario 7-2 ~ 343
Scenario 7-3 ~ 345
Scenario 7-1 Answers ~ 348
Scenario 7-2 Answers ~ 349
Scenario 7-3 Answers ~ 351

Chapter 8
Bridging ~ 354
How to Best Use This Chapter ~ 355
“Do I Know This Already?” Quiz ~ 355
Introduction: The Difference between Routed and Nonrouted Protocols ~ 359
Layer 2 and Layer 3 Functions ~ 359
Bridging Versus Routing ~ 360
Configuring Transparent and Integrated Routing and Bridging (IRB) ~ 362
The Spanning-Tree Protocol ~ 364
Configuring a Transparent Bridge ~ 366
Configuring IRB on a Cisco Router ~ 369
Source-Route Bridging ~ 376
Configuring Source-Route Bridging on a Cisco Router ~ 380
Source-Route Transparent and Source-Route Translational Bridging ~ 383
Source-Route Transparent Bridging ~ 383
Source-Route Translational Bridging (SR/TLB) ~ 384
Conclusion ~ 388
Scenario 8-1 ~ 393
Scenario 8-2 ~ 394
Scenario 8-3 ~ 396
Scenario 8-1 Answers ~ 398
Scenario 8-2 Answers ~ 399
Scenario 8-3 Answers ~ 400

Chapter 9
AppleTalk and ISDN Options ~ 402
How to Best Use This Chapter ~ 403
“Do I Know This Already?” Quiz ~ 404
Introduction to Managing AppleTalk Traffic and Advanced WAN Configurations ~ 407
AppleTalk Traffic Overview ~ 407
AppleTalk Protocol Stack ~ 408
AppleTalk Services ~ 408
Nonextended/Extended Networks ~ 410
Extended AppleTalk Internetwork ~ 411
AppleTalk Zones ~ 411
AppleTalk Filtering Options ~ 412
GetZoneList Filtering ~ 414
ZIP Reply Filtering ~ 418
RTMP Filtering ~ 421
NBP Filtering ~ 426
Configuring T1 and E1 ~ 429
Channelized T1/E1 Configuration Commands ~ 431
Channelized T1 Configuration Example ~ 434
Channelized E1 Configuration ~ 435
Channelized E1 Configuration Example ~ 436
Configuring Primary Rate Interface ~ 437
ISDN PRI Configuration Commands ~ 438
T1/E1 Controller Options for PRI ~ 439
ISDN PRI Configuration ~ 440
PRI Configuration Example ~ 441
Conclusion ~ 442
Scenario 9-1 ~ 445
Scenario 9-2 ~ 446
Scenario 9-3 ~ 447
Scenario 9-1 Answers ~ 448
Scenario 9-2 Answers ~ 449
Scenario 9-3 Answers ~ 450

Appendix A
Answers to Quizzes and Q&As ~ 452
Chapter 2 ~ 453
Answers to Chapter 2 “Do I Know This Already?” Quiz ~ 453
Answers to Chapter 2 Q&A Questions ~ 455
Chapter 3 ~ 458
Answers to Chapter 3 “Do I Know This Already?” Quiz ~ 458
Answers to Chapter 3 Q&A Questions ~ 459
Chapter 4 ~ 462
Answers to Chapter 4 “Do I Know This Already?” Quiz ~ 462
Answers to Chapter 4 Q&A Questions ~ 464
Chapter 5 ~ 467
Answers to Chapter 5 “Do I Know This Already?” Quiz ~ 467
Answers to Chapter 5 Q&A Questions ~ 468
Chapter 6 ~ 469
Answers to Chapter 6 “Do I Know This Already?” Quiz ~ 469
Answers to Chapter 6 Q&A Questions ~ 471
Chapter 7 ~ 473
Answers to Chapter 7 “Do I Know This Already?” Quiz ~ 473
Answers to Chapter 7 Q&A Questions ~ 474
Chapter 8 ~ 476
Answers to Chapter 8 “Do I Know This Already?” Quiz ~ 476
Answers to Chapter 8 Q&A Questions ~ 478
Chapter 9 ~ 481
Answers to Chapter 9 “Do I Know This Already?” Quiz ~ 481
Answers to Chapter 9 Q&A Questions ~ 482
Index ~ 484