Networking Essentials Companion Guide v3: Cisco Certified Support Technician (CCST) Networking 100-150

Networking Essentials Companion Guide v3: Cisco Certified Support Technician (CCST) Networking 100-150 is the official supplemental textbook for the Networking Essentials course in the Cisco Networking Academy. Networking is at the heart of the digital transformation. The network is essential to many business functions today, including business-critical data and operations, cybersecurity, and so much more. A wide variety of career paths rely on the network, so it's important to understand what the network can do, how it operates, and how to protect it. This is a great course for developers, data scientists, cybersecurity specialists, and other professionals looking to broaden their networking domain knowledge. It's also an excellent launching point for students pursuing a wide range of career pathways-from cybersecurity to software development to business and more. 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 250 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.

List of contents

Introduction xlii
Chapter 1 Communications in a Connected World 1
Objectives 1
Key Terms 1
Introduction (1.0) 2
Network Types (1.1) 2
Everything Is Online (1.1.2) 2
Who Owns The Internet? (1.1.3) 2
Local Networks (1.1.4) 3
Small Home Networks 4
Small Office and Home Office Networks 4
Medium to Large Networks 4
Worldwide Networks 6
Mobile Devices (1.1.5) 6
Smartphone 6
Tablet 7
Smartwatch 8
Smart Glasses 8
Connected Home Devices (1.1.6) 8
Security System 8
Appliances 9
Smart TV 10
Gaming Console 11
Other Connected Devices (1.1.7) 11
Smart Cars 11
RFID Tags 12
Sensors and Actuators 13
Medical Devices 13
Data Transmission (1.2) 14
The Bit (1.2.2) 14
Common Methods of Data Transmission (1.2.3) 15
Bandwidth and Throughput (1.3) 17
Bandwidth (1.3.1) 17
Throughput (1.3.2) 18
Communications in a Connected World Summary (1.4) 18
What Did I Learn in This Chapter? (1.4.1) 19
Reflection Questions (1.4.2) 20
Practice 21
Check Your Understanding Questions 21
Chapter 2 Network Components, Types, and Connections 25
Objectives 25
Key Terms 25
Introduction (2.0) 26
Clients and Servers (2.1) 26
Client and Server Roles (2.1.2) 26
Peer-to-Peer Networks (2.1.3) 27
Peer-to-Peer Applications (2.1.4) 28
Multiple Roles in the Network (2.1.5) 29
Network Components (2.2) 30
Network Infrastructure (2.2.2) 30
End Devices (2.2.3) 32
ISP Connectivity Options (2.3) 33
ISP Services (2.3.1) 33
ISP Connections (2.3.2) 34
Cable and DSL Connections (2.3.3) 35
Additional Connectivity Options (2.3.4) 36
Network Components, Types, and Connections Summary (2.4) 37
What Did I Learn in This Chapter? (2.4.1) 37
Reflection Questions (2.4.2) 38
Practice 39
Check Your Understanding Questions 39
Chapter 3 Wireless and Mobile Networks 41
Objectives 41
Key Terms 41
Introduction (3.0) 42
Wireless Networks (3.1) 42
Other Wireless Networks (3.1.3) 43
Global Positioning System 43
Wi-Fi 43
Bluetooth 43
NFC 43
Mobile Device Connectivity (3.2) 44
Mobile Devices and Wi-Fi (3.2.1) 44
Wi-Fi Settings (3.2.2) 44
Configure Mobile Wi-Fi Connectivity (3.2.3) 46
Configure Cellular Data Settings (3.2.4) 47
Android Cellular Data 47
iOS Cellular Data 48
Simple Connectivity with Bluetooth (3.2.6) 49
Bluetooth Pairing (3.2.7) 50
Explore Your Network Settings on Your Mobile Device (3.2.8) 51
Wireless and Mobile Networks Summary (3.3) 52
What Did I Learn in This Chapter? (3.3.1) 52
Reflection Questions (3.3.2) 53
Practice 54
Check Your Understanding Questions 54
Chapter 4 Build a Home Network 57
Objectives 57
Key Terms 57
Introduction (4.0) 58
Home Network Basics (4.1) 58
Components of a Home Network (4.1.2) 58
Typical Home Network Routers (4.1.3) 59
Network Technologies in the Home (4.2) 60
LAN Wireless Frequencies (4.2.1) 61
Wired Network Technologies (4.2.2) 62
Category 5e Cable 62
Coaxial Cable 62
Fiber-Optic Cable 63
Wireless Standards (4.3) 63
Wi-Fi Networks (4.3.1) 64
Wireless Settings (4.3.2) 64
Network Mode 65
Set Up a Home Router (4.4) 66
First Time Setup (4.4.1) 66
Design Considerations (4.4.2) 67
Build a Home Network Summary (4.5) 69
What Did I Learn in This Chapter? (4.5.1) 69
Reflection Questions (4.5.2) 71
Practice 72
Packet Tracer Activities 72
Check Your Understanding Questions 72
Chapter 5 Communication Principles 75
Objectives 75
Key Terms 75
Introduction (5.0) 76
Networking Protocols (5.1) 76
Communication Protocols (5.1.1) 76
Why Protocols Matter (5.1.2) 78
Communication Standards (5.2) 80
The Internet and Standards (5.2.2) 80
Network Standards Organizations (5.2.3) 80
Network Communication Models (5.3) 81
The TCP/IP Model (5.3.3) 81
The OSI Reference Model (5.3.4) 82
OSI Model and TCP/IP Model Comparison (5.3.5) 83
Communication Principles Summary (5.4) 85
What Did I Learn in This Chapter? (5.4.1) 85
Reflection Questions (5.4.2) 87
Practice 88
Check Your Understanding Questions 88
Chapter 6 Network Media 91
Objectives 91
Key Terms 91
Introduction (6.0) 92
Network Media Types (6.1) 92
Three Media Types (6.1.2) 92
Common Network Cables (6.1.3) 93
Twisted-Pair Cable 93
Coaxial Cable 94
Fiber-Optic Cable 95
Network Media Summary (6.2) 95
What Did I Learn in This Chapter? (6.2.1) 95
Reflection Questions (6.2.2) 96
Practice 97
Check Your Understanding Questions 97
Chapter 7 The Access Layer 101
Objectives 101
Key Terms 101
Introduction (7.0) 102
Encapsulation and the Ethernet Frame (7.1) 102
Encapsulation (7.1.2) 102
The Access Layer (7.2) 104
Ethernet Frame (7.2.1) 104
Access Layer Devices (7.2.2) 105
Ethernet Hubs (7.2.3) 106
Ethernet Switches (7.2.4) 107
The MAC Address Table (7.2.5) 109
The Access Layer Summary (7.3) 111
What Did I Learn in This Chapter? (7.3.1) 111
Reflection Questions (7.3.2) 113
Practice 114
Check Your Understanding Questions 114
Chapter 8 The Internet Protocol 117
Objectives 117
Introduction (8.0) 118
Purpose of an IPv4 Address (8.1) 118
The IPv4 Address (8.1.1) 118
Octets and Dotted-Decimal Notation (8.1.2) 119
The IPv4 Address Structure (8.2) 119
Networks and Hosts (8.2.2) 119
Summary (8.3) 121
What Did I Learn in This Chapter? (8.3.1) 121
Reflection Questions (8.3.2) 121
Practice 122
Packet Tracer Activities 122
Check Your Understanding Questions 122
Chapter 9 IPv4 and Network Segmentation 125
Objectives 125
Key Terms 125
Introduction (9.0) 126
IPv4 Unicast, Broadcast, and Multicast (9.1) 126
Unicast (9.1.2) 126
Broadcast (9.1.4) 127
Multicast (9.1.6) 129
Types of IPv4 Addresses (9.2) 130
Public and Private IPv4 Addresses (9.2.1) 130
Routing to the Internet (9.2.2) 131
Special-Use IPv4 Addresses (9.2.4) 132
Loopback Addresses 132
Link-Local addresses 133
Legacy Classful Addressing (9.2.5) 133
Assignment of IP Addresses (9.2.6) 134
Network Segmentation (9.3) 135
Broadcast Domains and Segmentation (9.3.2) 136
Problems with Large Broadcast Domains (9.3.3) 137
Reasons for Segmenting Networks (9.3.4) 138
IPv4 and Network Segmentation Summary (9.4) 140
What Did I Learn in This Chapter? (9.4.1) 140
Reflection Questions (9.4.2) 143
Practice 144
Check Your Understanding Questions 144
Chapter 10 IPv6 Addressing Formats and Rules 147
Objectives 147
Key Terms 147
Introduction (10.0) 148
IPv4 Issues (10.1) 148
The Need for IPv6 (10.1.1) 148
Internet of Things 149
IPv4 and IPv6 Coexistence (10.1.2) 150
Dual Stack 150
Tunneling 150
Translation 151
IPv6 Addressing (10.2) 152
Hexadecimal Number System (10.2.1) 152
IPv6 Addressing Formats (10.2.2) 152
Preferred Format 153
Rule 1Omit Leading Zeros (10.2.4) 153
Rule 2Double Colon (10.2.5) 155
IPv6 Addressing Formats and Rules Summary (10.3) 156
What Did I Learn in This Chapter? (10.3.1) 157
Reflection Questions (10.3.2) 158
Practice 159
Check Your Understanding Questions 159
Chapter 11 Dynamic Addressing with DHCP 163
Objectives 163
Key Term 163
Introduction (11.0) 164
Static and Dynamic Addressing (11.1) 164
Static IPv4 Address Assignment (11.1.1) 164
Dynamic IPv4 Address Assignment (11.1.2) 165
DHCP Servers (11.1.3) 166
DHCPv4 Configuration (11.2) 167
DHCPv4 Operation (11.2.1) 168
DHCP Service Configuration (11.2.3) 169
Dynamic Addressing with DHCP Summary (11.3) 170
What Did I Learn in This Chapter? (11.3.1) 170
Reflection Questions (11.3.2) 171
Practice 172
Packet Tracer Activities 172
Check Your Understanding Questions 172
Chapter 12 Gateways to Other Networks 175
Objectives 175
Key Term 175
Introduction (12.0) 176
Network Boundaries (12.1) 176
Routers as Gateways (12.1.2) 176
Routers as Boundaries Between Networks (12.1.3) 177
Network Address Translation (12.2) 178
NAT Operation (12.2.1) 179
Gateways to Other Networks Summary (12.3) 180
What Did I Learn in This Chapter? (12.3.1) 180
Reflection Questions (12.3.2) 181
Practice 182
Packet Tracer Activities 182
Check Your Understanding Questions 182
Chapter 13 The ARP Process 185
Objectives 185
Key Term 185
Introduction (13.0) 186
MAC and IP (13.1) 186
Destination on Same Network (13.1.1) 186
Destination on Remote Network (13.1.2) 187
Broadcast Containment (13.2) 189
Broadcast Domains (13.2.2) 190
Access Layer Communication (13.2.3) 191
ARP (13.2.5) 192
The ARP Process Summary (13.3) 193
What Did I Learn in This Chapter? (13.3.1) 193
Reflection Questions (13.3.2) 194
Practice 195
Packet Tracer Activities 195
Check Your Understanding Questions 195
Chapter 14 Routing Between Networks 199
Objectives 199
Key Terms 199
Introduction (14.0) 200
The Need for Routing (14.1) 200
Now We Need Routing (14.1.2) 200
The Routing Table (14.2) 201
Routing Table Entries (14.2.4) 202
The Default Gateway (14.2.5) 203
Create a LAN (14.3) 204
Local Area Networks (14.3.1) 205
Local and Remote Network Segments (14.3.2) 205
All Hosts in One Local Segment 206
Hosts on a Remote Segment 206
Routing Between Networks Summary (14.4) 208
What Did I Learn in This Chapter? (14.4.1) 208
Reflection Questions (14.4.2) 210
Practice 211
Packet Tracer Activities 211
Check Your Understanding Questions 211
Chapter 15 TCP and UDP 215
Objectives 215
Key Terms 215
Introduction (15.0) 216
TCP and UDP (15.1) 216
Protocol Operations (15.1.1) 216
TCP and UDP (15.1.2) 217
TCP Reliability (15.1.3) 218
UDP Best Effort Delivery (15.1.4) 218
Port Numbers (15.2) 219
TCP and UDP Port Numbers (15.2.1) 219
Socket Pairs (15.2.2) 222
The netstat Command (15.2.3) 223
TCP and UDP Summary (15.3) 224
What Did I Learn in This Chapter? (15.3.1) 224
Reflection Questions (15.3.2) 225
Practice 226
Check Your Understanding Questions 226
Chapter 16 Application Layer Services 229
Objectives 229
Key Terms 229
Introduction (16.0) 230
The Client-Server Relationship (16.1) 230
Client and Server Interaction (16.1.1) 230
Client Requests a Web Page (16.1.2) 231
URI, URN, and URL (16.1.3) 232
Network Application Services (16.2) 233
Common Network Application Services (16.2.1) 233
Domain Name System (16.3) 234
Domain Name Translation (16.3.1) 234
DNS Servers (16.3.2) 235
A Note About Syntax Checker Activities (16.3.3) 236
Web Clients and Servers (16.4) 236
HTTP and HTML (16.4.2) 237
FTP Clients and Servers (16.5) 238
File Transfer Protocol (16.5.1) 238
Virtual Terminals (16.6) 239
Telnet (16.6.2) 240
Security Issues with Telnet (16.6.3) 241
Email and Messaging (16.7) 242
Email Clients and Servers (16.7.1) 242
Email Protocols (16.7.2) 242
Simple Mail Transfer Protocol (SMTP) 243
Post Office Protocol (POP3) 243
Internet Message Access Protocol (IMAP4) 243
Text Messaging (16.7.3) 244
Internet Phone Calls (16.7.4) 245
Application Layer Services Summary (16.8) 245
What Did I Learn in This Chapter? (16.8.1) 245
Reflection Questions (16.8.2) 248
Practice 249
Packet Tracer Activities 249
Check Your Understanding Questions 249
Chapter 17 Network Testing Utilities 253
Objectives 253
Key Terms 253
Introduction (17.0) 254
Troubleshooting Commands (17.1) 254
Overview of Troubleshooting Commands (17.1.1) 254
The ipconfig Command (17.1.2) 254
The ping Command (17.1.4) 258
Ping Results (17.1.5) 259
Network Testing Utilities Summary (17.2) 260
What Did I Learn in This Chapter? (17.2.1) 260
Reflection Questions (17.2.2) 261
Practice 262
Packet Tracer Activities 262
Check Your Understanding Questions 262
Chapter 18 Network Design 265
Objectives 265
Key Terms 265
Introduction (18.0) 266
Reliable Networks (18.1) 266
Network Architecture (18.1.1) 266
Fault Tolerance (18.1.3) 267
Scalability (18.1.4) 267
Quality of Service (18.1.5) 269
Network Security (18.1.6) 270
Hierarchical Network Design (18.2) 271
Physical and Logical Addresses (18.2.1) 271
Hierarchical Analogy (18.2.4) 272
Access, Distribution, and Core (18.2.6) 273
Access Layer 273
Distribution Layer 274
Core Layer 274
Network Design Summary (18.3) 275
What Did I Learn in This Chapter? (18.3.1) 275
Reflection Questions (18.3.2) 276
Practice 277
Labs 277
Check Your Understanding Questions 277
Chapter 19 Cloud and Virtualization 281
Objectives 281
Key Terms 281
Introduction (19.0) 282
Cloud and Cloud Services (19.1) 282
Types of Clouds (19.1.2) 282
Cloud Services (19.1.3) 283
Cloud Computing and Virtualization (19.1.4) 284
Virtualization (19.2) 285
Advantages of Virtualization (19.2.1) 285
Hypervisors (19.2.2) 286
Type 1 HypervisorBare Metal Approach 286
Type 2 HypervisorHosted Approach 286
Cloud and Virtualization Summary (19.3) 287
What Did I Learn in This Chapter? (19.3.1) 287
Reflection Questions (19.3.2) 289
Practice 290
Labs 290
Check Your Understanding Questions 290
Chapter 20 Number Systems 293
Objectives 293
Key Terms 293
Introduction (20.0) 294
Binary Number System (20.1) 294
Binary and IPv4 Addresses (20.1.1) 294
Decimal to Binary Conversion (20.1.5) 296
Decimal to Binary Conversion Example (20.1.6) 300
IPv4 Addresses (20.1.9) 307
Hexadecimal Number System (20.2) 308
Hexadecimal and IPv6 Addresses (20.2.1) 308
Number Systems Summary (20.3) 311
What Did I Learn in This Chapter? (20.3.1) 311
Reflection Questions (20.3.2) 311
Practice 312
Check Your Understanding Questions 312
Chapter 21 Ethernet Switching 315
Objectives 315
Key Terms 315
Introduction (21.0) 316
Ethernet (21.1) 316
The Rise of Ethernet (21.1.1) 316
Ethernet Evolution (21.1.2) 317
Ethernet Frames (21.2) 318
Ethernet Encapsulation (21.2.1) 318
Data Link Sublayers (21.2.2) 319
MAC Sublayer (21.2.3) 320
Data Encapsulation 321
Accessing the Media 321
Ethernet Frame Fields (21.2.4) 322
Ethernet MAC Address (21.3) 324
MAC Address and Hexadecimal (21.3.1) 324
Unicast MAC Address (21.3.2) 326
Broadcast MAC Address (21.3.3) 327
Multicast MAC Address (21.3.4) 328
The MAC Address Table (21.4) 330
Switch Fundamentals (21.4.1) 330
Switch Learning and Forwarding (21.4.2) 331
Examine the Source MAC Address 331
Find the Destination MAC Address 332
Filtering Frames (21.4.3) 333
Ethernet Switching Summary (21.5) 336
What Did I Learn in This Chapter? (21.5.1) 336
Reflection Questions (21.5.2) 338
Practice 339
Labs 339
Check Your Understanding Questions 339
Chapter 22 Network Layer 343
Objectives 343
Key Terms 343
Introduction (22.0) 344
Network Layer Characteristics (22.1) 344
The Network Layer (22.1.2) 344
IP Encapsulation (22.1.3) 346
Characteristics of IP (22.1.4) 347
Connectionless (22.1.5) 347
Best Effort (22.1.6) 348
Media Independent (22.1.7) 349
IPv4 Packet (22.2) 350
IPv4 Packet Header (22.2.1) 350
IPv4 Packet Header Fields (22.2.2) 350
IPv6 Packet (22.3) 352
Limitations of IPv4 (22.3.1) 352
IPv6 Overview (22.3.2) 353
IPv4 Packet Header Fields in the IPv6 Packet Header (22.3.3) 354
IPv6 Packet Header (22.3.4) 356
Network Layer Summary (22.4) 357
What Did I Learn in This Chapter? (22.4.1) 357
Reflection Questions (22.4.2) 358
Practice 359
Check Your Understanding Questions 359
Chapter 23 IPv4 Address Structure 363
Objectives 363
Key Terms 363
Introduction (23.0) 364
IPv4 Address Structure (23.1) 364
Network and Host Portions (23.1.1) 364
The Subnet Mask (23.1.2) 365
The Prefix Length (23.1.3) 366
Determining the Network: Logical AND (23.1.4) 367
IPv4 Address Structure Summary (23.2) 369
What Did I Learn in This Chapter? (23.2.1) 369
Reflection Questions (23.2.2) 370
Practice 371
Check Your Understanding Questions 371
Chapter 24 Address Resolution 375
Objectives 375
Key Terms 375
Introduction (24.0) 376
ARP (24.1) 376
ARP Overview (24.1.1) 376
ARP Functions (24.1.2) 377
Removing Entries from an ARP Table (24.1.6) 380
ARP Tables on Devices (24.1.7) 381
ARP IssuesARP Broadcasts and ARP Spoofing (24.1.8) 382
Address Resolution Summary (24.2) 384
What Did I Learn in This Chapter? (24.2.1) 384
Reflection Questions (24.2.2) 385
Practice 386
Labs 386
Packet Tracer Activities 386
Check Your Understanding Questions 386
Chapter 25 IP Addressing Services 391
Objectives 391
Key Terms 391
Introduction (25.0) 392
DNS Services (25.1) 392
Domain Name System (25.1.2) 392
DNS Message Format (25.1.3) 395
DNS Hierarchy (25.1.4) 395
The nslookup Command (25.1.5) 397
DHCP Services (25.2) 398
Dynamic Host Configuration Protocol (25.2.1) 398
DHCP Messages (25.2.3) 399
IP Addressing Services Summary (25.3) 401
What Did I Learn in This Chapter? (25.3.1) 401
Reflection Questions (25.3.2) 402
Practice 403
Labs 403
Check Your Understanding Questions 403
Chapter 26 Transport Layer 407
Objectives 407
Key Terms 407
Introduction (26.0) 408
Transportation of Data (26.1) 408
Role of the Transport Layer (26.1.1) 408
Transport Layer Responsibilities (26.1.2) 409
Transport Layer Protocols (26.1.3) 413
Transmission Control Protocol (TCP) (26.1.4) 413
User Datagram Protocol (UDP) (26.1.5) 414
The Right Transport Layer Protocol for the Right Application (26.1.6) 415
TCP Overview (26.2) 417
TCP Features (26.2.1) 417
TCP Header (26.2.2) 418
TCP Header Fields (26.2.3) 418
Applications That Use TCP (26.2.4) 419
UDP Overview (26.3) 420
UDP Features (26.3.1) 420
UDP Header (26.3.2) 420
UDP Header Fields (26.3.3) 421
Applications That Use UDP (26.3.4) 421
Port Numbers (26.4) 422
Multiple Separate Communications (26.4.1) 422
Socket Pairs (26.4.2) 423
Port Number Groups (26.4.3) 424
The netstat Command (26.4.4) 426
TCP Communication Process (26.5) 427
TCP Server Processes (26.5.1) 427
TCP Connection Establishment (26.5.2) 430
Session Termination (26.5.3) 431
TCP Three-Way Handshake Analysis (26.5.4) 432
Reliability and Flow Control (26.6) 433
TCP ReliabilityGuaranteed and Ordered Delivery (26.6.1) 433
TCP ReliabilityData Loss and Retransmission (26.6.3) 435
TCP Flow ControlWindow Size and Acknowledgments (26.6.5) 437
TCP Flow ControlMaximum Segment Size (MSS) (26.6.6) 439
TCP Flow ControlCongestion Avoidance (26.6.7) 440
UDP Communication (26.7) 441
UDP Low Overhead Versus Reliability (26.7.1) 441
UDP Datagram Reassembly (26.7.2) 441
UDP Server Processes and Requests (26.7.3) 443
UDP Client Processes (26.7.4) 443
Transport Layer Summary (26.8) 447
What Did I Learn in This Chapter? (26.8.2) 447
Reflection Questions (26.8.3) 449
Practice 450
Packet Tracer Activities 450
Check Your Understanding Questions 450
Chapter 27 The Cisco IOS Command Line 455
Objectives 455
Key Terms 455
Introduction (27.0) 456
Navigate the IOS (27.1) 456
The Cisco IOS Command-Line Interface (27.1.1) 456
Primary Command Modes (27.1.2) 457
A Note About Syntax Checker Activities (27.1.5) 458
The Command Structure (27.2) 458
Basic IOS Command Structure (27.2.1) 458
IOS Command Syntax (27.2.2) 459
Hotkeys and Shortcuts (27.2.4) 460
View Device Information (27.3) 462
show Commands (27.3.2) 463
The Cisco IOS Command Line Summary (27.4) 469
What Did I Learn in This Chapter? (27.4.1) 469
Reflection Questions (27.4.2) 471
Practice 472
Packet Tracer Activities 472
Check Your Understanding Questions 472
Chapter 28 Build a Small Cisco Network 475
Objectives 475
Key Term 475
Introduction (28.0) 476
Basic Switch Configuration (28.1) 476
Basic Switch Configuration Steps (28.1.1) 476
Switch Virtual Interface Configuration (28.1.2) 478
Configure Initial Router Settings (28.2) 479
Basic Router Configuration Steps (28.2.1) 479
Basic Router Configuration Example (28.2.2) 480
Secure the Devices (28.3) 482
Password Recommendations (28.3.1) 482
Secure Remote Access (28.3.2) 483
Enable SSH (28.3.3) 485
Verify SSH (28.3.5) 487
Connecting the Switch to the Router (28.4) 488
Default Gateway for a Host (28.4.1) 488
Default Gateway on a Switch (28.4.2) 490
Build a Small Cisco Network Summary (28.5) 492
What Did I Learn in This Chapter? (28.5.1) 492
Reflection Questions (28.5.2) 495
Practice 496
Packet Tracer Activities 496
Check Your Understanding Questions 496
Chapter 29 ICMP 499
Objectives 499
Introduction (29.0) 500
ICMP Messages (29.1) 500
ICMPv4 and ICMPv6 Messages (29.1.1) 500
Host Reachability (29.1.2) 500
Destination or Service Unreachable (29.1.3) 501
Time Exceeded (29.1.4) 502
ICMPv6 Messages (29.1.5) 502
Ping and Traceroute Tests (29.2) 505
PingTest Connectivity (29.2.1) 505
Ping the Local Loopback (29.2.2) 506
Ping the Default Gateway (29.2.3) 507
Ping a Remote Host (29.2.4) 508
TracerouteTest the Path (29.2.5) 509
Round-Trip Time (RTT) 509
IPv4 TTL and IPv6 Hop Limit 509
ICMP Summary (29.3) 511
What Did I Learn in This Chapter? (29.3.2) 511
Reflection Questions (29.3.3) 513
Practice 514
Packet Tracer Activities 514
Check Your Understanding Questions 514
Chapter 30 Physical Layer 519
Objectives 519
Key Terms 519
Introduction (30.0) 520
Purpose of the Physical Layer (30.1) 520
The Physical Connection (30.1.1) 520
The Physical Layer Process (30.1.2) 522
Physical Layer Characteristics (30.2) 523
Physical Layer Standards (30.2.1) 523
Physical Components (30.2.2) 525
Encoding (30.2.3) 525
Signaling (30.2.4) 525
Bandwidth (30.2.6) 527
Bandwidth Terminology (30.2.7) 528
Latency 528
Throughput 529
Goodput 529
Copper Cabling (30.3) 529
Characteristics of Copper Cabling (30.3.1) 529
Types of Copper Cabling (30.3.2) 531
Unshielded Twisted-Pair (UTP) (30.3.3) 531
Shielded Twisted-Pair (STP) (30.3.4) 533
Coaxial Cable (30.3.5) 533
UTP Cabling (30.4) 535
Properties of UTP Cabling (30.4.1) 535
UTP Cabling Standards and Connectors (30.4.2) 536
Straight-Through and Crossover UTP Cables (30.4.3) 539
Fiber-Optic Cabling (30.5) 541
Properties of Fiber-Optic Cabling (30.5.1) 541
Types of Fiber Media (30.5.2) 541
Single-Mode Fiber 541
Multimode Fiber 542
Fiber-Optic Cabling Usage (30.5.3) 543
Fiber-Optic Connectors (30.5.4) 543
Fiber Patch Cords (30.5.5) 545
Fiber Versus Copper (30.5.6) 547
Summary (30.6) 548
What Did I Learn in This Chapter? (30.6.1) 548
Reflection Questions (30.6.2) 550
Practice 551
Check Your Understanding Questions 551
Chapter 31 Data Link Layer 555
Objectives 555
Key Terms 555
Introduction (31.0) 556
Topologies (31.1) 556
Physical and Logical Topologies (31.1.1) 556
WAN Topologies (31.1.2) 558
Point-to-Point 558
Hub and Spoke 558
Mesh 559
Point-to-Point WAN Topology (31.1.4) 559
LAN Topologies (31.1.5) 560
Legacy LAN Topologies 560
Media Access Control Methods (31.2) 561
Half- and Full-Duplex Communication (31.2.1) 562
Half-Duplex Communication 562
Full-Duplex Communication 562
Access Control Methods (31.2.2) 563
Contention-Based Access 563
Controlled Access 564
Contention-Based AccessCSMA/CD (31.2.3) 564
Contention-Based AccessCSMA/CA (31.2.4) 566
Summary (31.3) 568
What Did I Learn in This Chapter? (31.3.1) 568
Re...

Summary

Networking Essentials Companion Guide v3: Cisco Certified Support Technician (CCST) Networking 100-150 is the official supplemental textbook for the Networking Essentials course in the Cisco Networking Academy.
Networking is at the heart of the digital transformation. The network is essential to many business functions today, including business-critical data and operations, cybersecurity, and so much more. A wide variety of career paths rely on the network, so it's important to understand what the network can do, how it operates, and how to protect it.
This is a great course for developers, data scientists, cybersecurity specialists, and other professionals looking to broaden their networking domain knowledge. It's also an excellent launching point for students pursuing a wide range of career pathwaysfrom cybersecurity to software development to business and more.
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 250 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.

Product details

• Authors: Cisco Networking Academy, Cisco Networking Academy, Cisco Networking Academy
• Publisher: Pearson Academic
• Languages: English
• Product format: Paperback / Softback
• Released: 22.02.2024
• EAN: 9780138321338
• ISBN: 978-0-13-832133-8
• No. of pages: 976
• Dimensions: 200 mm x 230 mm x 45 mm
• Weight: 1746 g
• Series: Pearson; Cisco Networking Academy Program
• Subject: Natural sciences, medicine, IT, technology > IT, data processing > Data communication, networks