CONTENTS

Acknowledgments

Introduction

Chapter 1     Network Models

Working with Models

Biography of a Model

Network Models

The OSI Seven-Layer Model on a Simple Network

Welcome to MHTechEd!

Let’s Get Physical—Network Hardware and Layers 1–2

Beyond the Single Wire—Network Software and Layers 3–7

The OSI Seven-Layer Model and Remote Work

Chapter Review

Questions

Answers

Chapter 2     Cabling and Topology

Network Topologies

Bus and Ring

Star

Hybrid

Mesh

Parameters of a Topology

Cabling and Connectors

Copper Cabling and Connectors

Fiber-Optic Cabling and Connectors

Fire Ratings

Networking Industry Standards—IEEE

Chapter Review

Questions

Answers

Chapter 3     Ethernet Basics

Ethernet

802.3 Standards

Ethernet Frames

Early Ethernet Standards

Bus Ethernet

10BASE-T

10BASE-FL

CSMA/CD

Enhancing and Extending Ethernet Networks

The Trouble with Hubs

Switches to the Rescue

Connecting Ethernet Segments

Troubleshooting Switches

Chapter Review

Questions

Answers

Chapter 4     Ethernet Standards

100-Megabit Ethernet

100BASE-T

100BASE-FX

100BASE-SX

Full-Duplex Ethernet

Gigabit Ethernet

1000BASE-SX

1000BASE-LX

SFF Fiber Connectors

Mechanical Connection Variations

Implementing Multiple Types of Gigabit Ethernet

Ethernet Evolutions

10 Gigabit Ethernet

Chapter Review

Questions

Answers

Chapter 5     Installing a Physical Network

Understanding Structured Cabling

Cable Basics—A Star Is Born

Structured Cable—Network Components

Structured Cable—Beyond the Star

Installing Structured Cabling

Getting a Floor Plan

Mapping the Runs

Determining the Location of the Telecommunications Room

Pulling Cable

Making Connections

Testing the Cable Runs

NICs

Buying NICs

Link Lights

Diagnostics and Repair of Physical Cabling

Diagnosing Physical Problems

Check Your Lights

Check the NIC

Cable Testing

Problems in the Telecommunications Room

Toners

Chapter Review

Questions

Answers

Chapter 6     TCP/IP Basics

The TCP/IP Protocol Suite

Network Layer Protocols

Transport Layer Protocols

Application Layer Protocols

IP and Ethernet

IP Addresses

IP Addresses in Action

Class IDs

CIDR and Subnetting

Subnetting

CIDR: Key Takeaways

IP Address Assignment

Static IP Addressing

Dynamic IP Addressing

Special IP Addresses

Chapter Review

Questions

Answers

Chapter 7     Routing

How Routers Work

Routing Tables

Freedom from Layer 2

Network Address Translation

Dynamic Routing

Routing Metrics

Distance Vector and Path Vector

Link State

EIGRP

Dynamic Routing Makes the Internet

Route Redistribution and Administrative Distance

Working with Routers

Connecting to Routers

Basic Router Configuration

Router Problems

Chapter Review

Questions

Answers

Chapter 8     TCP/IP Applications

Transport Layer and Network Layer Protocols

How People Communicate

TCP

UDP

ICMP

IGMP

The Power of Port Numbers

Registered Ports

Connection Status

Rules for Determining Good vs. Bad Communications

Common TCP/IP Applications

Telnet and SSH

E-mail

SQL

FTP

HTTP and HTTPS

TCP/IP Applications Chart

Other Layer 7 Applications

Chapter Review

Questions

Answers

Chapter 9     Network Naming

Before DNS

NetBIOS

hosts

DNS

How DNS Works

Administering DNS Servers

Troubleshooting DNS on Clients

Diagnosing TCP/IP Network Issues

Chapter Review

Questions

Answers

Chapter 10   Securing TCP/IP

Making TCP/IP Secure

Encryption

Integrity

Nonrepudiation

Authentication

Authorization

TCP/IP Security Standards

User Authentication Standards

Encryption Standards

Combining Authentication and Encryption

Secure TCP/IP Applications

HTTPS

Securing E-Mail Protocols

SCP

SFTP

SNMP

LDAP

NTP

Chapter Review

Questions

Answers

Chapter 11   Switch Features

Switch Management

Access Management

Port Configuration

Port Security

Virtual LANs

Trunking

Configuring a VLAN-Capable Switch

Assigning VLANs and Tagging

VLAN Trunking Protocol

Inter-VLAN Routing

DHCP and VLANs

Voice VLANs

Private VLANs

Troubleshooting VLANs

Multilayer Switches

Load Balancing

QoS and Traffic Shaping

Port Bonding

Network Protection

Chapter Review

Questions

Answers

Chapter 12   IPv6

IPv6 Concepts

IPv6 Addresses

Neighbor Discovery

IPv6 Implementations

Stateless Address Autoconfiguration (SLAAC)

Aggregation

IPv6 and DNS

Moving to IPv6

IPv4 and IPv6

Transition Mechanisms

Chapter Review

Questions

Answers

Chapter 13   WAN Connectivity

WAN Technologies

SONET

Fiber Improvements

Private WANs

Last-Mile Technologies

DSL

Broadband Cable

Satellite

Fiber

Cellular WAN

Which Connection?

Remote Access

Remote Terminal

Virtual Private Networks

WAN Troubleshooting Scenarios

Loss of Internet Connectivity

Interface Errors

DNS Issues

Interference

Chapter Review

Questions

Answers

Chapter 14   Wireless Networking

Wi-Fi Standards

802.11

802.11b

802.11a

802.11g

802.11n

802.11ac

802.11ax

WPS

Wi-Fi Security

Enterprise Wireless

Implementing Wi-Fi

Performing a Site Survey

Installing the Client

Setting Up an Ad Hoc Network

Setting Up an Infrastructure Network

Extending the Network

Verifying the Installation

Troubleshooting Wi-Fi

No Connection

Slow Connection

Weird Connection

Chapter Review

Questions

Answers

Chapter 15   Virtualization and Cloud Computing

Virtualization and Cloud Computing Concepts

Virtualization

Cloud Computing

Infrastructure as Code

Virtual Networking

Putting Network Virtualization and Cloud Computing to Work

Setting Up Rocket.Chat in a Local Hypervisor

Managing Cloud Resources

Setting Up Rocket.Chat on IaaS

Desktop as a Service

Interconnecting Local and Cloud Resources

Chapter Review

Questions

Answers

Chapter 16   Data Centers

Classic Data Center Architecture and Design

Tiers

Traffic Flows

Data Storage

Where Is the Classic Data Center?

The Modern Data Center

Virtualization

Software-Defined Networking

Spine and Leaf

High Availability in the Data Center

Load Balancing

Redundancy

Facilities and Infrastructure Support

Documenting the Data Center

Network Diagrams

Baseline Configurations

Assessments

Chapter Review

Questions

Answers

Chapter 17   Integrating Network Devices

Internet of Things

IoT Home Automation

IoT Home Security

IoT Communications Technologies

Hardening IoT Devices

Unified Communication

It Started with VoIP

Unified Communication Features

VTC and Medianets

UCaaS

ICS

DCS

PLC

SCADA

Chapter Review

Questions

Answers

Chapter 18   Network Operations

Risk Management

Hardening and Security Policies

Change Management

Patching and Updates

Training

Common Agreements

Security Preparedness

Contingency Planning

Incident Response

Disaster Recovery

Business Continuity

Forensics

Chapter Review

Questions

Answers

Chapter 19   Protecting Your Network

Security Concepts

CIA

Zero Trust

Defense in Depth

Separation of Duties

Network Threats

Threat Terminology

Spoofing

Packet/Protocol Abuse

Zero-Day Attacks

Rogue Devices

ARP Cache Poisoning

Denial of Service

On-Path Attack

Session Hijacking

Password Attacks

Physical/Local Access

Malware

Social Engineering

Common Vulnerabilities

Unnecessary Running Services

Unpatched/Legacy Systems

Unencrypted Channels

Cleartext Credentials

RF Emanation

Hardening Your Network

Physical Security

Network Security

Device Hardening

Host Security

Firewalls

Types of Firewalls

Implementing and Configuring Firewalls

Troubleshooting Firewalls

Chapter Review

Questions

Answers

Chapter 20   Network Monitoring

SNMP

Monitoring Tools

Packet Sniffers

Protocol Analyzers

Sensors

Interface Monitors

Performance Monitors

Putting It All Together

Scenario: Monitoring and Managing

SIEM

Chapter Review

Questions

Answers

Chapter 21   Network Troubleshooting

Troubleshooting Tools

Hardware Tools

Software Tools

The Troubleshooting Process

Identify the Problem

Establish a Theory of Probable Cause

Test the Theory to Determine the Cause

Establish a Plan of Action and Identify Potential Effects

Implement the Solution or Escalate as Necessary

Verify Full System Functionality and Implement Preventive Measures

Document Findings, Actions, Outcomes, and Lessons Learned

Resolving Common Network Service Issues

“We Can’t Access Our Web Server in Istanbul!”

Network Troubleshooting Considerations

Hands-On Problems

Nearby Problems

Far-flung Problems

Network Performance Issues

Troubleshooting Is Fun!

Chapter Review

Questions

Answers

Appendix A   Exam Objective Map

Exam N10-008

Appendix B   Create Your Study Plan

Review Your Overall Score

Review Your Score by CompTIA Network+ Exam Domain

Appendix C   About the Online Content

System Requirements

Your Total Seminars Training Hub Account

Privacy Notice

Single User License Terms and Conditions

TotalTester Online

Pre-Assessment

Create Your Study Plan

Playing the CompTIA Network+ Introduction Video

Mike’s CompTIA Network+ Video Training Sample

TotalSims Sample for CompTIA Network+

Mike’s Cool Tools

Technical Support

Glossary

Index

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