Introduction xxvi
PART I FOUNDATIONS
Chapter 1
Shipping Things
“Do I Know This Already?” Quiz
Foundation Topics
The Purpose of Packaging
The Physical World
Computer Networks
Addressing
The Physical World
Computer Networks
Hosts and Devices
Packaging Data
What Is a Protocol?
What Is Metadata?
Tunnels
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 2
Addresses
“Do I Know This Already?” Quiz
Foundation Topics
Address Scope
Receiver Set
Topological Reach
Physical Addresses
Internet Protocol Version 4
Why Two Addresses?
What an IP Address Represents
Calculating Prefixes and Subnets Using Subnet Masks
Calculating Prefixes and Subnets Using a Skip Chart
Calculating Prefixes Using Skips
Internet Protocol Version 6
Aggregation
Network Prefixes
Private Address Space
Publicly Routable Address Space
Reserved Addresses
Ports and Sockets
Network Address Translation
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 3
Routing and Switching
“Do I Know This Already?” Quiz
Foundation Topics
Assigning IP Addresses to Hosts
Manual Configuration
Calculate an IP Address
Computing a Link Local Address
Computing a Global Address
Physical Addresses and Privacy
Assign an Address Through a Protocol
IPv4 DHCP
IPv6 DHCP and Router Advertisements
Host-to-Host Communication and Address Resolution on a Single Wire
IPv4 Address Resolution
IPv6 Address Resolution
Switching Packets
Multiple Hops and Switching
Routing Packets
Using the Routing Table to Forward Packets
Building the Routing Table
Metrics
What Happens Inside a Router?
Routers versus Switches
Routing Loops
Asymmetric Paths
Redirects and Relays
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 4
Wired Host Networking Configuration
“Do I Know This Already?” Quiz
Foundation Topics
Windows
The Settings App
The Control Panel
The Command Line
Mac (Operating Software) OS
System Preferences
The Terminal Command Line
System Information
Linux
Verifying Connectivity
Ping
Traceroute
Finding Your Public IP Address
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 5
What's in a Network?
“Do I Know This Already?” Quiz
Foundation Topics
Hosts and Virtual Hosts
Mobile Devices
Things
Middleboxes
The Firewall
The Intrusion Detection System
The Proxy or Gateway
The Load Balancer
The Global Internet
Internet Assigned Numbers Authority
Internet Corporation for Assigned Names and Numbers
Regional Internet Registries
Top-Level Domain Owners
Transit Providers
Access Providers
Content Providers
Content Distribution Networks
Internet Exchange Providers
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 6
Network Models
“Do I Know This Already?” Quiz
Foundation Topics
Why Are Models Important?
The Open Systems Interconnection (OSI) Seven-Layer Model
The Transmission Control Protocol (TCP)/ Internet Protocol (IP) Model
The Recursive Internet Architecture
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
PART II INFRASTRUCTURE
Chapter 7
Wired Networks
“Do I Know This Already?” Quiz
Foundation Topics
Electrical Transmission and Interference
Measuring Interference
Other Cable Ratings
The Maximum Transmission Unit
Ethernet over Copper
Ethernet Bus Topologies
Ethernet Star Topologies
Ethernet Twisted Pair
Power Over Ethernet
Fiber
Fiber Cables
Fiber Networking Hardware
Fiber Connectors
Looking into a Fiber
Pluggable Interfaces
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 8
Wireless Networks
“Do I Know This Already?” Quiz
Foundation Topics
Free Space Concepts
Wave Propagation and Beam Forming
Wireless Interference
Bandwidth and Signal Strength
The Electromagnetic Spectrum
Wi-Fi
Wi-Fi Components
Wi-Fi Mesh Systems
Advantages and Disadvantages of Wireless Fidelity (Wi-Fi)
Sharing the Bandwidth
Channel Selection
Cellular
Radio Access Network (RAN)
Mobile Core
Advantages and Disadvantages of Cellular Networks
Satellite
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 9
Bandwidth, Delay, and Jitter
“Do I Know This Already?” Quiz
Foundation Topics
Bandwidth and Throughput
Throughput versus Bandwidth
Bandwidth versus Goodput
The Bandwidth of a Link versus Bandwidth of a Path
Bandwidth and Delay
Clocking Packets onto the Wire
Queueing
Jitter
Measuring Network Performance
Speed Test Websites
Internet Performance Working Group(iPerf)
Mike's Traceroute (MTR)
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 10
Basic Network Hardware
“Do I Know This Already?” Quiz
Foundation Topics
Hardware, Ports, and Lights
Network Diagrams
Network Wiring
Handling the Heat
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 11
Local Area Networks
“Do I Know This Already?” Quiz
Foundation Topics
Building and Campus Networks
Equipment Closet (Building Distribution Frame)
Wiring Closet (Intermediate Distribution Frame)
Server Room
Riser
Wi-Fi Access Points
Zoned Access
The Home Network
Network Core
Modulation and Demodulation (MODEM)
Physical Connections to the Home
Cable Cutting
Combining the MODEM with Other Devices
Demarcation
The Service Set Identifier (SSID) and Wi-Fi Guest Network
Which Devices Should Be Wired?
Wi-Fi Limitations
Traffic Flows
Choosing Devices to Wire
Configuring the Home Network
Configuring the MODEM
Configuring the Router and Firewall
Main Configuration Screen
The More Settings Screen
Advanced Options
Network Address Translation (NAT) Forwarding
Configuring the Wireless Access Point
SSID and Password
Security
Configuring a Windows Host for Wi-Fi Connectivity
Configuring Apple's macOS for Wi-Fi Connectivity
Configuring Mobile Devices for Wi-Fi Connectivity
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 12
Wide Area Networks
“Do I Know This Already?” Quiz
Foundation Topics
Common Challenges to Building Wide Area Networks
Right-of-Way
Physical Plant
Metro and Last-Mile Network Design
Transit Provider Design
Ring and Hub-and-Spoke Topologies
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
PART III SERVICES
Chapter 13
Data Centers and Fabrics
“Do I Know This Already?” Quiz
Foundation Topics
Web Applications
Internet Exchange Points
Spine-and-Leaf Fabrics
Clos Fabrics
Butterfly Fabrics
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 14
Network Transport
“Do I Know This Already?” Quiz
Foundation Topics
Internet Protocol Version 4
Fragmentation
Time to Live
Internet Protocol Version 6
Internet Protocol Version 6 (IPv6) Goals
Autoconfiguration
Eliminating NAT
IPv6 Packet Format
User Datagram Protocol
Connectionless versus Connection-Oriented Transport Protocols
The User Datagram Protocol (UDP) Header
Checksums
Transmission Control Protocol
Building a Transmission Control Protocol (TCP) Connection
TCP Flow and Error Control
Quick UDP Internet Connections (QUIC)
Identifying Flows
Path Maximum Transmission Unit (MTU) Discovery
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 15
Application Transport
“Do I Know This Already?” Quiz
Foundation Topics
Marshaling Systems
Fixed-Length Fields
Type-Length Values
Secure Shell
Hypertext Transfer Protocol
File Transfer Protocol
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 16
Names and Time
“Do I Know This Already?” Quiz
Foundation Topics
The Domain Name Space
Domain Names Can Represent an Organization
Domain Names Can Represent a Service
Domain Names Can Represent a Piece of Information
Domain Names and Addresses from a Computer Networking Perspective
The Life of a Domain Name System DNS Query
Negative DNS Responses
Common DNS Records
DNS Architecture and Operations
Recursive Servers
Root Servers
Top Level Domain (TLD) Servers
Authoritative Servers
DNS Security and Privacy
Encrypted DNS Queries
Oblivious Encrypted DNS Queries
Encrypted DNS Records
Diagnosing DNS
Name Server Lookup
Domain Information Groper
Web-Based DNS Tools
The Network Time Protocol
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 17
Cloud Computing
“Do I Know This Already?” Quiz
Foundation Topics
Cloud Computing
Who Owns the Resources
Cloud Computing Service Models
Typical Public Cloud Service Mix
Cloud Resilience
Connecting to the Cloud
Public versus Private Cloud
Insurance Estimation Application
Manufacturing Internet of Things (IOT) Deployment
Customer Analytics
Choosing Public or Private Cloud
The Impact of Cloud Computing on Network Engineering
Pets versus Cattle
Automation
Cloud-Based Network Management
Remote and Hybrid Work
Employment Shifts
Information Technology Cycles
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
PART IV SECURITY
Chapter 18
Security and Privacy Concepts
“Do I Know This Already?” Quiz
Foundation Topics
A Security Taxonomy
Shift Left
Privacy Concepts
Personally Identifiable Information
Data Lifecycle
The Law and Privacy
Privacy Tools
Suppression
Noise Injection
Aggregation
Segmentation
Privacy and Network Operations
Forwarded Packets
Logged Information
Protecting Logged User Information
Authentication, Authorization, and Accounting
Identity Stores
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 19
Attacks and Threats
“Do I Know This Already?” Quiz
Foundation Topics
Defining Attacks and Threats
Attack Surface
Vulnerability
Threat
Exploit
Risk
Gaining Access
Social Engineering
Malware
Supply Chain Attack
Poor Configuration
Man-in-the-Middle Attacks
Lateral Movement
Attack Actions
Command and Control
Data Exfiltration
Ransomware
Denial of Service
Direct (or Burner) Attack
Reflection Attack
Resource Exhaustion
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 20
Security Tools
“Do I Know This Already?” Quiz
Foundation Topics
Authentication Tools
Single Sign-On
Zero Trust
Strong Passwords
Two-Factor Authentication (2FA)
Passwordless Systems
Defensive Tools and Design
Stateful and Contextual Packet Filtering
Source Address Validation
Defense in Depth
Countering Spam and Phishing
System-Level Defenses
How to Detect a Phish
Encryption
Exchanging Private Keys
Cryptographic Signatures
Virtual Private Networks
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
PART V MANAGING NETWORKS
Chapter 21
Managing Networks
“Do I Know This Already?” Quiz
Foundation Topics
Network Documentation
Descriptions
Baselines
Failure Reports
Hardware and Software
Network Processes and Lifecycle
Managing Change
Testing Techniques
Technical Debt
Management Challenges
The Observability Problem
Failure Rates in the Real World
Connecting to Manage
In-Band and Out-of-Band Management
Connecting Through a Terminal Emulator
Device Management Security Practices
Management Systems
Network Management Systems (NMS) Dashboard
Work Process System
Modeling Language versus Configuration
Cloud-Managed Networks
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 22
Troubleshooting
“Do I Know This Already?” Quiz
Foundation Topics
Failure Terminology
What Is a Failure?
Failure Frequency
Fragility and Resilience
Troubleshooting Tools and Techniques
The Half-Split Method
Fixes
The Post-Mortem
Applying the Process: An Example
Packet Captures
Advice to Troubleshooters
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
Chapter 23
Configuring a Network
“Do I Know This Already?” Quiz
Foundation Topics
Initial Access
Configuring IPv4
Configuring Routing
Configuring Remote Access and Security
Adding IPv6
Adding a Switch
Review All the Key Topics
Key Terms You Should Know
Concepts and Actions
PART VI FINAL PREPARATION
Chapter 24
Final Preparation
Advice to Future Engineers
Learning Consolidation Activities
Suggested Plan for Final Review and Study
PART VII EXAM UPDATES
Chapter 25
Cisco Certified Support Technician CCST Networking 100-150 Official Cert Guide
Exam Updates
The Purpose of This Chapter
About Possible Exam Updates
Impact on You and Your Study Plan
News About the Next Exam Release
Updated Technical Content
PART VIII APPENDICES
Appendix A Answers to the “Do I Know This Already?” Questions
Glossary of Key Terms
Online Elements
Appendix B Concepts and Actions Memory Tables
Appendix C Solutions to Concepts and Actions Memory Tables
Appendix D Study Planner
Glossary of Key Terms
