Introduction to Networks Companion Guide is the official supplemental textbook for the Introduction to Networks course in the Cisco Networking Academy CCNA curriculum. The course introduces the architecture, protocols, functions, components, and models of the internet and computer networks. The principles of IP addressing and fundamentals of Ethernet concepts, media, and operations are introduced to provide a foundation for the curriculum. By the end of the course, you will be able to build simple LANs, perform basic configurations for routers and switches, understand the fundamentals of network security, and implement IP addressing schemes. The Companion Guide is designed as a portable desk reference to use anytime, anywhere to reinforce the material from the course and organize your time. The book's features help you focus on important concepts to succeed in this course: Chapter objectives: Review core concepts by answering the focus questions listed at the beginning of each chapter. Key terms: Refer to the lists of networking vocabulary introduced and highlighted in context in each chapter. Glossary: Consult the comprehensive Glossary with more than 300 terms. Summary of Activities and Labs: Maximize your study time with this complete list of all associated practice exercises at the end of each chapter. Check Your Understanding: Evaluate your readiness with the end-of-chapter questions that match the style of questions you see in the online course quizzes. The answer key explains each answer. How To: Look for this icon to study the steps you need to learn to perform certain tasks. Interactive Activities: Reinforce your understanding of topics with dozens of exercises from the online course identified throughout the book with this icon. Videos: Watch the videos embedded within the online course. Packet Tracer Activities: Explore and visualize networking concepts using Packet Tracer. There are multiple exercises interspersed throughout the chapters and provided in the accompanying Labs & Study Guide book. Hands-on Labs: Work through all the labs and other activities that are included in the course and published in the separate Labs & Study Guide.

Autorentext

Cisco Networking Academy teaches hundreds of thousands of students annually the skills needed to build, design, and maintain networks, improving their career prospects while filling the global demand for networking professionals. With 10,000 academies in 165 countries, it helps individuals prepare for industry-recognized certifications and entry-level information and communication technology careers in virtually every industry-developing foundational technical skills while acquiring vital 21st-century career skills in problem solving, collaboration, and critical thinking. Cisco Networking Academy uses a public-private partnership model to create the "world's largest classroom."

Inhalt

Introduction xxx
Chapter 1 Networking Today 1
Objectives 1
Key Terms 1
Introduction (1.0) 3
Networks Affect Our Lives (1.1) 3
Networks Connect Us (1.1.1) 3
No Boundaries (1.1.3) 3
Network Components (1.2) 4
Host Roles (1.2.1) 4
Peer-to-Peer (1.2.2) 5
End Devices (1.2.3) 6
Intermediary Devices (1.2.4) 6
Network Media (1.2.5) 7
Network Representations and Topologies (1.3) 8
Network Representations (1.3.1) 8
Topology Diagrams (1.3.2) 10
Physical Topology Diagrams 10
Logical Topology Diagrams 10
Common Types of Networks (1.4) 11
Networks of Many Sizes (1.4.1) 11
LANs and WANs (1.4.2) 12
LANs 13
WANs 14
The Internet (1.4.3) 15
Intranets and Extranets (1.4.4) 16
Internet Connections (1.5) 17
Internet Access Technologies (1.5.1) 17
Home and Small Office Internet Connections (1.5.2) 18
Businesses Internet Connections (1.5.3) 19
The Converging Network (1.5.4) 20
Reliable Networks (1.6) 23
Network Architecture (1.6.1) 23
Fault Tolerance (1.6.2) 24
Scalability (1.6.3) 24
Quality of Service (1.6.4) 25
Network Security (1.6.5) 26
Network Trends (1.7) 27
Recent Trends (1.7.1) 28
Bring Your Own Device (BYOD) (1.7.2) 28
Online Collaboration (1.7.3) 28
Video Communications (1.7.4) 29
Cloud Computing (1.7.6) 29
Technology Trends in the Home (1.7.7) 31
Powerline Networking (1.7.8) 31
Wireless Broadband (1.7.9) 32
Wireless Internet Service Providers 32
Wireless Broadband Service 32
Network Security (1.8) 33
Security Threats (1.8.1) 33
Security Solutions (1.8.2) 34
The IT Professional (1.9) 35
CCNA (1.9.1) 35
Networking Jobs (1.9.2) 36
Summary (1.10) 37
Networks Affect Our Lives 37
Network Components 37
Network Representations and Topologies 37
Common Types of Networks 37
Internet Connections 38
Reliable Networks 38
Network Trends 38
Network Security 39
The IT Professional 40
Practice 40
Check Your Understanding Questions 40
Chapter 2 Basic Switch and End Device Configuration 45
Objectives 45
Key Terms 45
Introduction (2.0) 46
Cisco IOS Access (2.1) 46
Operating Systems (2.1.1) 46
GUI (2.1.2) 47
Purpose of an OS (2.1.3) 48
Access Methods (2.1.4) 49
Terminal Emulation Programs (2.1.5) 50
IOS Navigation (2.2) 52
Primary Command Modes (2.2.1) 52
Configuration Mode and Subconfiguration Modes (2.2.2) 53
Navigate Between IOS Modes (2.2.4) 54
A Note About Syntax Checker Activities (2.2.6) 55
The Command Structure (2.3) 56
Basic IOS Command Structure (2.3.1) 56
IOS Command Syntax Check (2.3.2) 57
IOS Help Features (2.3.3) 58
Hot Keys and Shortcuts (2.3.5) 58
Basic Device Configuration (2.4) 61
Device Names (2.4.1) 61
Password Guidelines (2.4.2) 62
Configure Passwords (2.4.3) 63
Encrypt Passwords (2.4.4) 64
Banner Messages (2.4.5) 65
Save Configurations (2.5) 66
Configuration Files (2.5.1) 67
Alter the Running Configuration (2.5.2) 68
Capture Configuration to a Text File (2.5.4) 68
Ports and Addresses (2.6) 71
IP Addresses (2.6.1) 71
Interfaces and Ports (2.6.2) 73
Configure IP Addressing (2.7) 74
Manual IP Address Configuration for End Devices (2.7.1) 75
Automatic IP Address Configuration for End Devices (2.7.2) 76
Switch Virtual Interface Configuration (2.7.4) 77
Verify Connectivity (2.8) 78
Summary (2.9) 79
Cisco IOS Access 79
IOS Navigation 79
The Command Structure 79
Basic Device Configuration 79
Save Configurations 80
Ports and Addresses 80
Configure IP Addressing 80
Verify Connectivity 80
Practice 81
Check Your Understanding Questions 81
Chapter 3 Protocols and Models 85
Objectives 85
Key Terms 85
Introduction (3.0) 86
The Rules (3.1) 86
Communications Fundamentals (3.1.2) 86
Communication Protocols (3.1.3) 87
Rule Establishment (3.1.4) 88
Network Protocol Requirements (3.1.5) 88
Message Encoding (3.1.6) 89
Message Formatting and Encapsulation (3.1.7) 90
Message Size (3.1.8) 91
Message Timing (3.1.9) 92
Message Delivery Options (3.1.10) 92
A Note About the Node Icon (3.1.11) 94
Protocols 94
Network Protocol Overview (3.2.1) 94
Network Protocol Functions (3.2.2) 95
Protocol Interaction (3.2.3) 96
Protocol Suites (3.3) 97
Network Protocol Suites (3.3.1) 97
Evolution of Protocol Suites (3.3.2) 98
TCP/IP Protocol Example (3.3.3) 99
TCP/IP Protocol Suite (3.3.4) 99
Application Layer 101
Transport Layer 102
Internet Layer 102
Network Access Layer 103
TCP/IP Communication Process (3.3.5) 103
Standards Organizations (3.4) 108
Open Standards (3.4.1) 108
Internet Standards (3.4.2) 108
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