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ExamGuideand MikeMeyers’CompTIASecurity+® CertificationGuide.
Scott has taught computer classes all over the United States, including stints at the United Nations in New York and the FBI Academy in Quantico. Practicing what he preaches, Scott is a CompTIA A+, CompTIA Network+, and CompTIA Security+ certified technician, a Microsoft Certified Professional, a Microsoft Office User Specialist, and Certiport Internet and Computing Core Certified.
About the Technical Editor
Jonathan S. Weissman is an associate professor and IT program coordinator (Department of Computing Sciences) at Finger Lakes Community College. He is also a senior lecturer (Department of Computing Security) at Rochester Institute of Technology and teaches part-time at Syracuse University (Department of Electrical Engineering and Computer Science) and Nazareth College (School of Management).
Jonathan is the co-author of MikeMeyers’CompTIA Network+®CertificationPassport,SixthEditionand Mike Meyers’CompTIANetwork+®GuidetoManagingand TroubleshootingNetworksLabManual,FifthEdition, and also serves as technical editor for many industry textbooks. Jonathan also developed three courses for the edX RITx Cybersecurity MicroMasters program, which he has taught to more than 50,000 students worldwide. In addition to teaching, Jonathan is a networking and cybersecurity consultant for local businesses and individuals.
Jonathan has a master’s degree in Computer Science from Brooklyn College and holds 34 industry certifications, including CCNP® Routing and Switching, CCNA® Security, CompTIA Security+, CompTIA Network+, CompTIA A+, Certified Ethical Hacker, Computer Hacking Forensic
Investigator, and IPv6 Certified Network Engineer (Gold), among others.
LinkedIn: https://www.linkedin.com/in/jonathan-s-weissman058b649b
Twitter: https://twitter.com/cscprof
Becoming a CompTIA Certified IT
Professional Is Easy
It’s also the best way to reach greater professional opportunities and rewards.
Why Get CompTIA Certified?
Growing Demand
Labor estimates predict some technology fields will experience growth of more than 20% by the year 2020. (Source: CompTIA 9th Annual Information Security Trends study: 500 U.S. IT and Business Executives Responsible for Security.) CompTIA certification qualifies the skills required to join this workforce.
Higher Salaries
IT professionals with certifications on their resume command better jobs, earn higher salaries, and have more doors open
to new multi-industry opportunities.
Verified Strengths
Ninety-one percent of hiring managers indicate CompTIA certifications are valuable in validating IT expertise, making certification the best way to demonstrate your competency and knowledge to employers. (Source: CompTIA Employer Perceptions of IT Training and Certification.)
Universal Skills
CompTIA certifications are vendor neutral—which means that certified professionals can proficiently work with an extensive variety of hardware and software found in most organizations.
© 2018 CompTIA Properties, LLC, used under license by CompTIA Certifications, LLC. All rights reserved. All certification programs and education related to such programs are operated exclusively by CompTIA Certifications, LLC. CompTIA is a registered trademark of CompTIA Properties, LLC in the U.S. and internationally. Other brands and company names mentioned herein may be trademarks or service marks of CompTIA Properties, LLC or of their respective owners. Reproduction or dissemination of this courseware sheet is prohibited without written consent of CompTIA Properties, LLC. Printed in the U.S. 04711Jan2018.
CONTENTS AT A GLANCE
Chapter 1 Network Models
Chapter 2 Cabling and Topology
Chapter 3 Ethernet Basics
Chapter 4 Modern Ethernet
Chapter 5 Installing a Physical Network
Chapter 6 TCP/IP Basics
Chapter 7 Routing
Chapter 8 TCP/IP Applications
Chapter 9 Network Naming
Chapter 10 Securing TCP/IP
Chapter 11 Advanced Networking Devices
Chapter 12 IPv6
Chapter 13 Remote Connectivity
Chapter 14 Wireless Networking
Chapter 15 Virtualization and Cloud Computing
Chapter 16 Mobile Networking
Chapter 17 Building a Real-World Network
Chapter 18 Managing Risk
Chapter 19 Protecting Your Network
Chapter 20 Network Monitoring
Chapter 21 Network Troubleshooting
Appendix A Objective Map: CompTIA Network+
Appendix B Create Your Study Plan
Appendix C About the Online Content
Glossary
Index
Acknowledgments
Introduction
Chapter 1 Network Models
Historical/Conceptual
Working with Models
Biography of a Model Network Models
The OSI Seven-Layer Model in Action Welcome to MHTechEd!
Test Specific
Let’s Get Physical—Network Hardware and Layers 1–2
Beyond the Single Wire—Network Software and Layers 3–7
The TCP/IP Model
The Link Layer
The Internet Layer
The Transport Layer
The Application Layer Frames, Packets, and Segments/Datagrams, Oh My!
The Tech’s Troubleshooting Tools Chapter Review Questions Answers
Chapter 2 Cabling and Topology
Test Specific
Network Topologies
Bus and Ring
Star
Hybrid
Mesh
Parameters of a Topology
Cabling and Connectors
Copper Cabling and Connectors
Fiber-Optic Cabling and Connectors
Other Cables
Fire Ratings
Networking Industry Standards—IEEE
Chapter Review
Questions
Answers
Chapter 3 Ethernet Basics
Historical/Conceptual
Ethernet
802.3 Standards
Test Specific
Ethernet Frames
Early
Enhancing and Extending Ethernet Networks
The Trouble with Hubs
Switches to the Rescue
Connecting Ethernet Segments
Troubleshooting Switches
Chapter Review
Questions
Answers
Chapter 4 Modern Ethernet
Test Specific
100-Megabit Ethernet
100BaseT
100BaseFX
Gigabit Ethernet
1000BaseSX
1000BaseLX
SFF Fiber Connectors
Mechanical Connection Variations
Implementing Multiple Types of Gigabit
Ethernet
Ethernet Evolutions
10 Gigabit Ethernet
Beyond Network+
IEEE 802.3ba
Chapter Review
Questions
Answers
Chapter 5 Installing a Physical Network Historical/Conceptual
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
Historical/Conceptual
Test Specific
The TCP/IP Protocol Suite
Internet Layer Protocols
Transport Layer Protocols
Application Layer Protocols
IP and Ethernet
IP Addresses
IP Addresses in Action
Class IDs
CIDR and Subnetting
Subnetting
CIDR: Subnetting in the Real World
IP Address Assignment
Static IP Addressing
Dynamic IP Addressing
Special IP Addresses
Chapter Review Questions Answers
Chapter 7 Routing
Historical/Conceptual
How Routers Work
Test Specific
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
Working with Routers
Connecting to Routers
Basic Router Configuration
Router Problems
Chapter Review Questions Answers
Chapter 8 TCP/IP Applications
Historical/Conceptual
Transport Layer and Network Layer Protocols
How People Communicate
Test Specific
TCP
UDP
ICMP
IGMP
The Power of Port Numbers
Registered Ports
Connection Status
Rules for Determining Good vs. Bad Communications
Common TCP/IP Applications
The World Wide Web
Telnet and SSH
E-mail
FTP
Internet Applications
Chapter Review Questions Answers
Chapter 9 Network Naming
Test Specific
Before DNS
NetBIOS
hosts
DNS
How DNS Works
DNS Servers
Troubleshooting DNS
Diagnosing TCP/IP Networks
Chapter Review
Questions
Answers
Chapter 10 Securing TCP/IP
Test Specific
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
Chapter Review
Questions
Answers
Chapter 11 Advanced Networking Devices
Test Specific
Virtual Private Networks
PPTP VPNs
L2TP VPNs
SSL VPNs
DTLS VPNs
DMVPN
Alternative VPNs
Switch Management
Virtual LANs
Trunking
Configuring a VLAN-Capable Switch Tagging
VLAN Trunking Protocol
InterVLAN Routing
DHCP and VLANs
Troubleshooting VLANs
Multilayer Switches
Load Balancing
QoS and Traffic Shaping
Port Bonding
Network Protection
Chapter Review Questions
Answers
Chapter 12 IPv6
Test Specific
IPv6 Basics
IPv6 Address Notation
Link-Local Address
IPv6 Prefix Lengths
The End of Broadcast
Global Unicast Address
Aggregation
Using IPv6
It Just Works
DHCPv6
DNS in IPv6
Moving to IPv6
IPv4 and IPv6
Transition Mechanisms
Chapter Review
Questions
Answers
Chapter 13 Remote Connectivity
Historical/Conceptual
Telephony and Beyond
The Dawn of Long Distance
Test Specific
Digital Telephony
Copper Carriers: T1 and T3
Fiber Carriers: SONET/SDH and OC
Packet Switching
Real-World WAN
Alternative to Telephony WAN
The Last Mile
Dial-Up
DSL
Broadband Cable Satellite Fiber
Which Connection?
Using Remote Access
Dial-Up to the Internet
Private Dial-Up
Dedicated Connection
Remote Terminal
WAN Troubleshooting Scenarios
Loss of Internet Connectivity
Interface Errors
DNS Issues Interference
Chapter Review Questions Answers
Chapter 14 Wireless Networking
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
Historical/Conceptual
Concepts of Virtualization
Meet the Hypervisor
Emulation vs. Virtualization
Desktop Virtualization
Test Specific
Virtualization Benefits
Power Saving
Hardware Consolidation
System Recovery
System Duplication
Research
Virtualization in Modern Networks
Hypervisors
Scaling Virtualization
To the Cloud
The Service-Layer Cake
Cloud Delivery Models
Chapter Review
Questions
Answers
Chapter 16 Mobile Networking
Mobile Network Technologies
Test Specific
Cellular WAN
802.11
Bluetooth
Less Common Mobile Network Technologies Deployment Models
BYOD
COBO
COPE
CYOD
On-Boarding and Off-Boarding Scenarios
Geofencing
Locating and Disabling Lost Mobile Devices
Hardening IoT Devices
Chapter Review
Questions
Answers
Chapter 17 Building a Real-World Network Test
Designing a Basic Network
Define the Network Needs
Documentation
Network Design
Compatibility Issues
Internal Connections
External Connections
Unified Communication
It Started with VoIP
Unified Communication Features
VTC and Medianets
ICS
DCS
PLC
SCADA
Chapter Review Questions
Answers
Chapter 18 Managing Risk
Test Specific
Risk Management
Security Policies
Change Management
Patching and Updates
Training
Points of Failure
Standard Business Documents
Security Preparedness
Contingency Planning
Incident Response
Disaster Recovery
Business Continuity
Forensics
Safety
Electrical Safety
Physical/Installation Safety
Rack Installation and Maintenance
Emergency Procedures
Chapter Review
Questions
Answers
Chapter 19 Protecting Your Network
Test Specific
Network Threats
Spoofing
Packet/Protocol Abuse
Zero-Day Attacks
ARP Cache Poisoning
Denial of Service
Man-in-the-Middle
Session Hijacking
Brute Force
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
Test Specific
SNMP
Monitoring Tools
Packet Sniffers
Protocol Analyzers
Interface Monitors
Performance Monitors
Putting It All Together
Scenario: Monitoring and Managing
SIEM
Chapter Review
Questions
Answers
Chapter 21 Network Troubleshooting
Test Specific
Troubleshooting Tools
Hardware Tools
Software Tools
The Troubleshooting Process
Identify the Problem
Establish a Theory of Probable Cause
Test the Theory to Determine Cause
Establish a Plan of Action and Identify Potential Effects
Implement the Solution or Escalate as Necessary
Verify Full System Functionality and Implement Preventative Measures
Document Findings, Actions, and Outcomes
Resolving Common Network Service Issues
“We Can’t Access Our Web Server in Istanbul!”
Hands-On Problems
LAN Problems
WAN Problems
Beyond Local—Escalate
End-to-End Connectivity
Troubleshooting Is Fun!
Chapter Review
Questions
Answers
Appendix A Objective Map: CompTIA Network+
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
Single User License Terms and Conditions
TotalTester Online
Assessment Test
TotalSims for Network+
Mike’s Video Training
Playing the Mike Meyers Introduction Video
Mike’s Cool Tools
Technical Support
Glossary Index
