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Cisco Networking Essentials, 2nd Edition

ISBN: 978-1-119-09215-5
480 pages
August 2015
Cisco Networking Essentials, 2nd Edition (1119092159) cover image

Description

Start a career in networking

Cisco Networking Essentials, 2nd Edition provides the latest for those beginning a career in networking. This book provides the fundamentals of networking and leads you through the concepts, processes, and skills you need to master fundamental networking concepts. Thinking of taking the CCENT Cisco Certified Entry Networking Technician ICND1 Exam 100-101? This book has you covered! With coverage of important topics and objectives, each chapter outlines main points and provides clear, engaging discussion that will give you a sound understanding of core topics and concepts. End-of-chapter review questions and suggested labs help reinforce what you've learned, and show you where you may need to backtrack and brush up before exam day.

Cisco is the worldwide leader in networking products and services, which are used by a majority of the world's companies. This book gives you the skills and understanding you need to administer these networks, for a skillset that will serve you anywhere around the globe.

  • Understand fundamental networking concepts
  • Learn your way around Cisco products and services
  • Gain the skills you need to administer Cisco routers and switches
  • Prepare thoroughly for the CCENT exam

If you're interested in becoming in-demand, network administration is the way to go; if you want to develop the skillset every company wants to hire, Cisco Networking Essentials, 2nd Edition gets you started working with the most widespread name in the business.

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Table of Contents

Introduction xxiii

Chapter 1 Networks 1

Describing Network Components 1

Defining the Benefits of Networks 2

Identifying the Requirements for a Network 5

Classifying Networks by Function 8

Understanding LANs 9

Understanding WANs10

Defining Network Architectures 10

Understanding Peer-to-Peer Networks 11

Understanding Client-Server Networks 14

The Essentials and Beyond   17

Chapter 2 The OSI Model 19

Using Reference Models 19

Understanding the Benefits of Reference   21

Exploring Reference Model Examples  21

Introducing the Layers of the OSI Model 22

Understanding the Application Layer  23

Understanding the Presentation Layer 24

Understanding the Session Layer 26

Understanding the Transport Layer   26

Understanding the Network Layer 30

Understanding the Data-Link Layer   31

Understanding the Physical Layer 33

Describing the OSI Encapsulation Process 33

Identifying the Process on the Source Device 34

Identifying the Process on the Destination Device 35

The Essentials and Beyond   36

Chapter 3 TCP/IP 39

Understanding the TCP/IP Model 40

Exploring the Four Layers 41

Comparing the OSI and TCP/IP Models44

Describing the TCP/IP Encapsulation Process 46

Understanding Data and PDUs 46

Describing the Contents of Data  47

Describing the Contents of Segments 47

Describing the Contents of Packets   47

Describing the Contents of Frames   47

Understanding the Conversion to Bits 48

Describing the Functions at the Transport Layer 50

Understanding TCP 50

Understanding UDP 51

Describing the Functions at the Internet Layer 52

Defining Logical Addressing  53

Performing Routing 54

Accomplishing Packet Forwarding 54

Describing the Functions of ARP 55

Illustrating the ARP Broadcast 55

Describing the Logic of MAC-to-IP-Address Conversion 57

The Essentials and Beyond   59

Chapter 4 Protocols 63

Understanding the Function of Protocols 64

Defining Routed Protocols   64

Defining Routing Protocols   64

Exploring Application Layer Protocols   65

Describing FTP 65

Describing TFTP   67

Describing SMTP   67

Describing DNS 69

Describing SNMP   70

Exploring Transport Layer Protocols 72

Reviewing TCP 72

Reviewing UDP 76

Exploring Internet Layer Protocols  77

Describing IP  77

Describing ARP 79

Describing ICMP   80

Describing IGMP   82

Exploring Network Access Layer Protocols 83

Defining Network Access Layer Protocols on the LAN 84

Defining Network Access Layer Protocols on the WAN 85

The Essentials and Beyond   86

Chapter 5 Physical and Logical Topologies 91

Designing the Physical Topology 91

Implementing a Bus Topology 92

Implementing a Ring Topology 93

Implementing a Star Topology 94

Implementing a Mesh Topology  96

Implementing a Hybrid Topology 97

Implementing a Point-to-Point Topology   98

Implementing a Point-to-Multipoint Topology  100

Designing the Logical Topology 101

Understanding the Token Ring Topology  101

Understanding the FDDI Ring Topology  102

Understanding the Star Topology 103

The Essentials and Beyond  105

Chapter 6 Numbering Systems 109

Exploring Binary Numbering  109

Understanding the Base-2 Numbering System  110

Understanding the Relationship between Binary and Computers   112

Exploring Hexadecimal Numbering 114

Understanding the Base-16 Numbering System 114

Identifying MAC Addresses  116

Applying Conversions 118

Decimal-to-Binary Conversion  118

Hex-to-Decimal Conversion 121

Binary-to-Hex Conversion  123

The Essentials and Beyond  124

Chapter 7 Classful IP Addressing 129

Describing the Function of IP Addresses 129

Identification 130

Segmentation 131

Identifying IP Address Types   132

Defining IP Address Classes 133

Identifying Network and Host Addresses  135

Describing Private IP Addresses and NAT 138

Utilizing Diagnostic Tools 139

Executing the ipconfig Command   141

Executing the ping Command  141

Executing the arp Command142

Executing the traceroute Command 143

Understanding DHCP 143

Operations   143

Cisco DHCP  145

Introducing IPv6146

IPv6 Address Format   146

IPv6 Address Types147

Special IPv6 Addresses 148

The Essentials and Beyond  148

Chapter 8 Classless IP Addressing 153

Understanding the Limitations of Classful Networking  153

Exhaustion of the Class B Network Address Space   154

Unmanageable Routing Tables  154

Exhaustion of the 32-Bit IPv4 Address Space   155

Understanding the Benefi ts of Subnetting   155

Identifying Sources of Network Congestion156

Deploying Subnetting as a Segmentation Tool  157

Describing the Components of CIDR   158

Introducing Classless Subnetting158

Designing and Implementing CIDR  160

Understanding VLSM  167

Summarization   171

The Essentials and Beyond  172

Chapter 9 Media 175

Selecting the Proper Media Type 175

Bandwidth   176

Security 176

Convenience  180

Cost 180

Understanding Cabling   181

Describing Cable Behavior and Characteristics  181

Describing Physical Implementations183

Choosing the Correct Wiring Standard   187

Describing Wireless Standards 191

Identifying Standards Bodies191

Understanding 80211 Amendments  192

Understanding Wireless LAN Components and Terminology   193

Describing CSMA/CA Operation 196

The Essentials and Beyond  198

Chapter 10 Network Devices 201

Describing Device Functions   201

Understanding Repeaters   202

Understanding Hubs   202

Understanding Bridges 203

Understanding Switches 205

Understanding Routers 209

Understanding Wireless Access Points and Wireless Routers   214

Understanding Device Placement Principles  216

Defining Broadcast Domains 216

Defining Collision Domains 217

Understanding the Cisco Three-Layer Model 220

The Essentials and Beyond  221

Chapter 11 LAN Operations 225

Understanding the Routing Process 225

Describing Routing Tables  226

Understanding Population Methods  229

Understanding Administrative Distance   231

Using Routing Protocols234

Describing the Switching Process  243

Reviewing MAC and IP Addresses 243

Reviewing Contention Methods 244

Describing MAC Address Tables 246

Understanding Frame Forwarding   246

Describing End-to-End Communications 247

Understanding the Local LAN Process 248

Understanding the Remote Communication Process 249

The Essentials and Beyond  250

Chapter 12 Managing the Cisco IOS 253

Describing Components   253

Defining the Contents of RAM  254

Defining the Contents of NVRAM   255

Defining the Contents of Flash  255

Defining the Contents of ROM  256

Describing IOS Navigation 258

Connecting to the Device   258

Accessing User, Privileged, and Global Configuration Modes   262

Understanding and Managing the Boot Process 266

Understanding the Boot Process 267

Managing the IOS 270

Understanding Configuration Files  271

Managing the Configuration Register 272

The Essentials and Beyond  276

Chapter 13 Configuring Routers 281

Cabling the Router   281

Cabling Router to Router   284

Cabling Router to Switch   287

Cabling PC to Router   288

Cabling Router to CSU/DSU 290

Creating a Console Session292

Connecting with the Console Cable  292

Connecting Through the USB Port  293

Connecting Through Telnet 294

Handling Initial Setup  295

Configuring Passwords   295

Interpreting Prompts   295

Configuring Privileged (Enable) Passwords296

Configuring Enable Secret Passwords297

Configuring Line Passwords 297

Configuring Interfaces299

Accessing Interface Mode   299

Assigning an IP Address300

Enabling the Interface  301

Verifying the Interface  301

Configuring a Router as a DHCP Server   303

Configuring WAN Interfaces 306

Saving Configuration Changes 308

The Essentials and Beyond  309

Chapter 14 Configuring Switches 315

Cabling the Switch   315

Cabling Switch to Switch   316

Cabling Router to Switch   317

Cabling Hosts to Switch318

Creating a Session with the Switch 318

Creating a Session with the Console Cable 318

Creating a Session Through Telnet   320

Configuring Passwords   321

Configuring Privileged (Enable) Passwords 321

Configuring Enable Secret Passwords 322

Configuring Line Passwords 322

Using the service password-encryption Command   322

Configuring Interfaces323

Accessing Switchports and Using Switchport Mode  323

Enabling the Port 324

Verifying the Port 324

Understanding Advanced Switch Functions  325

Understanding VLANs  325

Configuring VLANs 325

Assigning Ports to VLANs   326

Understanding Trunk Ports  327

Configuring Trunk Links   328

Describing STP   328

Understanding Port Security 332

Limiting MAC Addresses 332

Implementing Sticky Mac   333

The Essentials and Beyond  333

Chapter 15 Configuring Static Routing 337

Populating the Routing Table  338

Using the ip route Command 338

Verifying the Route Table   340

Configuring Inter-VLAN Routing  341

Creating a Trunk Link with Encapsulation 342

Creating and Configuring Subinterfaces  343

Troubleshooting VLANs 345

Troubleshooting Trunk Links 346

Troubleshooting Inter-VLAN Routing 347

The Essentials and Beyond  348

Chapter 16 Configuring Dynamic Routing 353

Understanding Routing Protocols  353

Exploring RIP355

Exploring EIGRP  357

Exploring OSPF   358

Configuring Routing Protocols 358

Enabling a Routing Protocol and Accessing Router Mode 359

Defining the Interfaces on Which the Protocol Is Operational  360

Verifying the Routing Table 361

The Essentials and Beyond  367

Chapter 17 Device Security 371

Understanding Access Lists 371

Understanding Standard Access Lists 373

Understanding Extended Access Lists 373

Configuring Numbered Access Lists 374

Configuring Named Access Lists 376

Editing Access Lists Using Sequence Numbers 377

Understanding Network Address Translation (NAT) 378

Implementing Static NAT, Dynamic NAT, and PAT 380

Configuring a Switch or Router as an NTP Client or Server  383

Implementing and Requiring SSH 384

Limiting Remote Access with ACLs 387

The Essentials and Beyond  388

Appendix A Answers to Review Questions 393

Appendix B CCNA Essentials: Ancillary Exercises 407

Index 437

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Author Information

About the Author

Troy McMillan holds more than 30 IT certifications, including CCNA and CCNP. As a Product Developer and Technical Editor for Kaplan IT, Troy provides tools to help individuals prepare for technology certifications. As a full-time trainer, he teaches Cisco, Microsoft, CompTIA, and wireless classes, helping organizations train their technology personnel.

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