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CompTIA

Network+

N10-005 Authorized

Emmett Dulaney

Mike Harwood

800 East 96th Street, Indianapolis, Indiana 46240 USA

Contents at a Glance

vi

Contents

Contents

x

xii

Contents

 - Introduction 

• CHAPTER 1 Introduction to Networking
• CHAPTER 2 OSI and TCP/IP Models and Network Protocols
• CHAPTER 3 Addressing and Routing
• CHAPTER 4 Components and Devices
• CHAPTER 5 Installation and Configuration
• CHAPTER 6 Cabling and Wiring
• CHAPTER 7 Wireless
• CHAPTER 8 Network Management
• CHAPTER 9 Network Optimization
• CHAPTER 10 Network Security
• CHAPTER 11 Network Troubleshooting - Practice Exam - Answers to Practice Exam - Practice Exam - Answers to Practice Exam - Glossary - Index
• Introduction Table of Contents
  • About Network+ Exam Cram.
  • About the Network+ Exam
    • CompTIA Network+ Exam Topics
    • Booking and Taking the Network+ Certification Exam
    • What to Expect from the Exam
    • A Few Exam Day Details.
    • After the Test
    • Last-Minute Exam Tips
• Introduction to Networking CHAPTER 1:
  • LANs, WANs, and Network Models
    • LANs
    • WANs
    • Network Models
    • Centralized Computing versus Distributed Computing
    • Cram Quiz Answers
  • Network Topologies
    • Bus Topology
    • Ring Topology.
    • Star Topology
    • Mesh Topology
    • Wireless Topologies
      • Topologies Point-to-Point, Point-to-Multipoint, and Wireless Mesh
    • Hybrid Topologies
    • Cram Quiz Answers
  • Going Virtual
    • Virtual Private Networks (VPNs)
    • Virtual Local Area Networks (VLANs)
    • Cram Quiz Answers
  • What Next?
• OSI and TCP/IP Models and Network Protocols CHAPTER 2:
  • The Networking Models
    • The OSI Seven-Layer Model
    • The TCP/IP Four-Layer Model
      • Components Operate Identifying the OSI Layers at Which Various Network
    • Cram Quiz Answers
  • Protocols
    • Connection-Oriented Protocols Versus Connectionless Protocols
    • Internet Protocol (IP)
    • Transmission Control Protocol (TCP)
    • User Datagram Protocol (UDP)
    • File Transfer Protocol (FTP)
    • Secure File Transfer Protocol (SFTP).
    • Trivial File Transfer Protocol (TFTP)
    • Simple Mail Transfer Protocol (SMTP)
    • Hypertext Transfer Protocol (HTTP)
    • Hypertext Transfer Protocol Secure (HTTPS)
      • Version 4 (POP3/IMAP4) Post Office Protocol Version 3/Internet Message Access Protocol
    • Telnet
    • Secure Shell (SSH)
    • Internet Control Message Protocol (ICMP).
      • Protocol (RARP) Address Resolution Protocol (ARP)/Reverse Address Resolution
    • Network Time Protocol (NTP)
    • Network News Transfer Protocol (NNTP)
    • Secure Copy Protocol (SCP)
    • Lightweight Directory Access Protocol (LDAP)
    • Internet Group Management Protocol (IGMP)
    • Transport Layer Security
      • Protocol (RTP) Session Initiation Protocol (SIP)/Real-Time Transport
    • TCP/IP Protocol Suite Summary
    • Cram Quiz Answers
  • Domain Name Service (DNS)
    • The DNS Namespace
    • Types of DNS Entries
    • DNS Records
    • DNS in a Practical Implementation CompTIA Network+ N10-005 Authorized Exam Cram
    • Cram Quiz Answers
  • Simple Network Management Protocol (SNMP)
    • Components of SNMP
    • SNMP Management Systems
    • SNMP Agents
    • Management Information Bases (MIBs)
    • SNMP Communities
    • SNMPv3
    • Cram Quiz Answers
  • Dynamic Host Configuration Protocol (DHCP)
    • The DHCP Process
    • DHCP and DNS Suffixes
    • Cram Quiz Answers
  • What Next?
• Addressing and Routing CHAPTER 3:
  • IP Addressing
    • IPv4
    • IP Address Classes
    • Subnet Mask Assignment
    • Subnetting
      • Networks Identifying the Differences Between IPv4 Public and Private
    • Classless Interdomain Routing (CIDR)
    • Default Gateways
    • IPv4 Address Types
    • IPv6 Addressing
    • Comparing IPv4 and IPv6 Addressing.
    • Assigning IP Addresses
    • Identifying MAC Addresses
      • Translation (PAT) Network Address Translation (NAT) and Port Address
    • Cram Quiz Answers
  • Understanding TCP/UDP Port Functions
    • Cram Quiz Answers
  • Managing TCP/IP Routing
    • The Default Gateway
    • Routing Tables
    • Static Routing vii
    • Dynamic Routing
    • Routing Metrics
    • Cram Quiz Answers
  • Configuring Routers and Switches
    • Power over Ethernet (PoE).
    • The Spanning Tree Protocol (STP)
    • Trunking.
    • Port Mirroring.
    • Port Authentication.
    • Cram Quiz Answers
  • What Next?
• Components and Devices CHAPTER 4:
  • Common Network Devices
    • Bridges
    • DHCP Server
    • Firewalls
    • Hubs
    • Media Converters
    • Modems
    • Network Cards
    • Routers.
    • Switches
    • Wireless Access Points.
    • Encryption Devices
    • Cram Quiz Answers
  • Specialized Network Devices
    • Bandwidth Shaper.
    • Content Filter
    • Load Balancer
    • Multilayer and Content Switches
    • Proxy Server
    • VPN Concentrator
    • Network Devices Summary
    • Cram Quiz Answers
  • Virtual Network Components
    • Virtual Desktops.
    • Virtual Servers
    • Virtual Switches
    • Virtual PBX.
    • Onsite Versus Offsite.
    • Network as a Service (NaaS)
    • Cram Quiz Answers
  • What Next?
• Installation and Configuration CHAPTER 5:
  • Creating a SOHO Network
    • Cram Quiz Answers
  • WAN Technologies.
    • Switching Methods
    • Integrated Services Digital Network (ISDN)
    • T-carrier Lines.
    • SONET/OCx Levels.
    • X.25 and Frame Relay
    • Asynchronous Transfer Mode (ATM)
    • Summary of WAN Technologies
    • Cram Quiz Answers
  • Internet Access Technologies
    • DSL Internet Access
    • Cable Internet Access
    • Broadband Security Considerations
    • POTS Internet Access
    • The Public Switched Telephone Network (PSTN)
    • Satellite Internet Access
    • Wireless Internet Access
    • Cellular
    • Cram Quiz Answers
  • What Next?
• Cabling and Wiring CHAPTER 6:
  • General Media Considerations
    • Broadband Versus Baseband Transmissions
    • Simplex, Half Duplex, and Full Duplex Modes
    • Media Interference
    • Attenuation
    • Data Transmission Rates
    • Types of Network Media
    • Types of Media Connectors
    • Media Converters
    • 568A and 568B Wiring Standards
    • Straight-Through Versus Crossover Cables
    • Rollover and Loopback Cables
    • Components of Wiring Distribution.
    • Cram Quiz Answers
  • Comparing and Contrasting LAN Technologies
    • IEEE 802.2 Standard.
    • 802.3 Ethernet Standards
    • Cram Quiz Answers
  • What Next?
• Wireless CHAPTER 7:
  • Understanding Wireless Basics
    • Wireless Access Points (APs).
    • Wireless Antennas
    • Wireless Radio Channels
    • Data Rate Versus Throughput.
    • Beacon Management Frame
    • Spread-Spectrum Technology
    • Orthogonal Frequency Division Multiplexing.
    • Infrared Wireless Networking
    • Establishing Communications Between Wireless Devices
    • Configuring the Wireless Connection.
    • Cram Quiz Answers
  • 802.11 Wireless Standards
    • The Magic Behind 802.11n
    • A Summary of 802.11 Wireless Standards
    • Cram Quiz Answers
  • Securing Wireless Networks
    • Wired Equivalent Privacy (WEP)
    • Wi-Fi Protected Access (WPA)
    • WPA2
    • WPA Enterprise
    • Cram Quiz Answers
  • Wireless Troubleshooting Checklist
    • Factors Affecting Wireless Signals
    • Cram Quiz Answers
  • What Next?
• Network Management CHAPTER 8:
  • Documentation Management
    • Wiring Schematics
    • Physical and Logical Network Diagrams
    • Baselines
    • Policies, Procedures, Configurations, and Regulations
    • Cram Quiz Answers
  • Monitoring Network Performance
    • Common Reasons to Monitor Networks
    • Packet Sniffers
    • Throughput Testing
    • Port Scanners
    • Network Performance, Load, and Stress Testing
    • Tracking Event Logs
    • Cram Quiz Answers
  • Networking Tools.
    • Wire Crimpers, Strippers, and Snips.
    • Voltage Event Recorder
    • Environmental Monitors
    • Toner Probes
    • Protocol Analyzer
    • Media/Cable Testers
    • TDR and OTDR
    • Multimeter
    • Network Qualification Tester
    • Butt Set
    • Wireless Detection
    • Cram Quiz Answers
  • Working with Command-Line Utilities
    • The Trace Route Utility (tracert/traceroute)
    • ping
    • ARP.
    • The netstat Command.
    • nbtstat
    • The ipconfig Command.
    • ifconfig
    • nslookup
    • dig.
    • The host Command
    • The route Utility
    • Cram Quiz Answers
  • What Next?
• Network Optimization CHAPTER 9:
  • Uptime and Fault Tolerance
    • Types of Fault Tolerance
    • Link Redundancy
    • Common Address Redundancy Protocol (CARP)
    • Using Uninterruptible Power Supplies (UPSs)
    • Cram Quiz Answers
  • Disaster Recovery.
    • Full Backups
    • Differential Backups
    • Incremental Backups
    • Tape Rotations
    • Backup Best Practices
    • Hot and Cold Spares
    • Hot, Warm, and Cold Sites
    • Cram Quiz Answers
  • Network Optimization Strategies.
    • Quality of Service (QoS)
    • Traffic Shaping.
    • Caching Engines
    • Cram Quiz Answers
  • What Next?
• Network Security CHAPTER 10:
  • Tunneling, Encryption, and Access Control - (ISAKMP). Internet Security Association and Key Management Protocol
    • Point-to-Point Tunneling Protocol (PPTP)
    • Layer 2 Tunneling Protocol (L2TP)
  • IPSec
  • Site-to-Site and Client-to-Site.
  • Overview of Access Control
  • Remote-Access Protocols and Services
  • Remote-Control Protocols
  • MAC Filtering
  • TCP/IP Filtering
  • Cram Quiz Answers
• Authentication, Authorization, and Accounting (AAA)
  • Passwords and Password Policies
  • Kerberos Authentication
  • Public Key Infrastructure
  • RADIUS and TACACS+
  • Remote Authentication Protocols.
  • Secured Versus Unsecured Protocols
  • Adding Physical Security to the Mix
  • Two-factor and Multifactor Authentication
  • Cram Quiz Answers
• Managing Common Security Threats
  • Viruses
  • Worms and Trojan Horses
  • Denial of Service and Distributed Denial of Service Attacks
  • Other Common Attacks
  • An Ounce of Prevention
  • Cram Quiz Answers
• Firewalls and Other Appliances
  • Stateful and Stateless Firewalls
  • Packet-Filtering Firewalls.
  • Circuit-Level Firewalls
  • Application Layer Firewalls
  • Comparing Firewall Types
  • Firewall Wrap-Up
  • Demilitarized Zones (Perimeter Network)
  • Other Security Devices
  • Cram Quiz Answers
• What Next?
• Network Troubleshooting CHAPTER 11:
  • Troubleshooting Steps and Procedures
    • Identify the Problem
    • Establish a Theory of Probable Cause.
    • Test the Theory to Determine Cause
    • Establish a Plan of Action.
    • Implement the Solution or Escalate
    • Verify Full System Functionality
    • Document the Findings, Actions, and Outcomes
    • Cram Quiz Answers
  • Troubleshooting the Network
    • Common Problems to Be Aware Of
    • Troubleshooting Wiring
    • Wiring Issues.
    • Troubleshooting Infrastructure Hardware
    • Configuring and Troubleshooting Client Connectivity
    • Troubleshooting an Incorrect VLAN
    • Topology Errors
    • Cram Quiz Answers
  • What Next?
• Practice Exam
  • Exam Questions
• Answers to Practice Exam - Answers at a Glance
  • Answers and Explanations
• Practice Exam
  • Exam Questions
• Answers to Practice Exam - Answers at a Glance
  • Answers and Explanations
• Glossary
• Index

Dedication

For Karen, Kristin, Evan, and Spencer: the backbone of my network. —Emmett Dulaney

Acknowledgments

I would like to thank Mike Harwood for creating a great book of which I was honored to join with this edition. Thanks are due to a wonderful team of tal- ented individuals, three of whom deserve special attention: Betsy Brown, Jeff Riley, and Christopher A. Crayton. They represent the best in the business.

—Emmett Dulaney

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As an associate publisher for Pearson, I welcome your comments. You can email or write me directly to let me know what you did or didn’t like about this book—as well as what we can do to make our books better.

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CompTIA Career Pathway

CompTIA offers a number of credentials that form a foundation for your career in technology and allow you to pursue specific areas of concentration. Depending on the path you choose to take, CompTIA certifications help you build upon your skills and knowledge, supporting learning throughout your entire career.

Steps to Getting Certified and Staying Certified Review Exam Objectives Review the certification objectives to make sure you know what is covered in theexam. http://www.comptia.org/certifications/testprep/examobjectives.aspx

Practice for the Exam

After you have studied for the certification, take a free assessment and sample test to get an idea what type of questions might be on the exam. http://www.comptia.org/ certifications/testprep/practicetests.aspx Purchase an Exam Voucher Purchase your exam voucher on the CompTIA Marketplace, which is located at:www.comptiastore.com

Take the Test!

Select a certification exam provider and schedule a time to take your exam. You can find exam providers at the following link: http://www.comptia.org/certifications/ testprep/testingcenters.aspx Stay Certified! Continuing Education

Effective January 1, 2011, new CompTIA Security+ certifications are valid for three years from the date of your certification. There are a number of ways the certification can be renewed. For more information go to: http://certification.comptia.org/ getCertified/steps_to_certification/stayCertified.aspx

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