Table of Contents
Introduction
Self-Assessment
Chapter 1: Introduction to Networking
Introduction
LANs, WANs, MANs, and WPANs
LANs
WANs
Metropolitan Area Networks (MANs)
WPANs
Network Models
Peer-to-Peer Networking Model
Client/Server Networking Model
Comparing Peer-to-Peer and Client/Server Network Models
Centralized and Distributed Computing
Virtual Private Networks (VPNs)
Components of the VPN Connection
VPN Pros and Cons
Virtual Local Area Networks (VLANs)
VLAN Membership
Network Topologies
Bus Topology
Ring Topology
Star Topology
Wired Mesh Topology
Wireless Topologies
Point-to-Point, Point-to-Multipoint, and Wireless Mesh Topologies
Hybrid Topologies
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 2: Cabling, Connectors, and Ethernet Standards
Introduction
General Media Considerations
Broadband Versus Baseband
Simplex, Half Duplex, and Full Duplex
Media Interference
Attenuation
Data Transmission Rates
Network Media
Twisted-Pair Cabling
Coaxial
Fiber-Optic Cable
Plenum Cables
Media Connectors
BNC Connectors
RJ-11 Connectors
RJ-45 Connectors
F-Type Connectors and RG-59 and RG-6
Fiber Connectors
RS-232 Standard
IEEE 1394
Universal Serial Bus (USB)
568A and 568B Wiring Standards
Straight Versus Crossover Cable
Rollover and Loopback Cables
Loopback Cable
Components of Wiring Distribution
Network Cross-Connects
Horizontal Cabling
Vertical Cable
Patch Panels
Type 66 and Type 110 Punchdown Blocks
MDF and IDF
Demarc, Demarc Extension, and Smart Jacks
Verify Wiring Installation and Termination
IEEE and Overview of Networking Standards
IEEE 802.2 Standard
IEEE 802.3x Standard Characteristics
802.3 Ethernet Standards
10BaseT
10BaseFL
Fast Ethernet
Gigabit Ethernet: 1000BaseX
1000BaseT
10 Gigabit Ethernet
10GBaseT
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 3: Networking Components and Devices
Introduction
Hubs
MSAU
Switches
Hub and Switch Cabling
Bridges
Bridge Placement and Bridging Loops
Types of Bridges
Routers
Gateways
Network Cards
Types of Network Interfaces
Installing Network Cards
Media Converters
Wireless Access Points
Modems
Firewalls
DHCP Server
Repeaters
Specialized Network Devices
Multilayer and Content Switches
Intrusion Detection and Prevention Systems
Load Balancer
Multifunction Network Devices
DNS Server
Bandwidth Shaper
Proxy Server
CSUs/DSUs
Network Devices Summary
Advanced Features of a Switch
Power over Ethernet (PoE)
Spanning Tree
Trunking
Port Mirroring
Port Authentication
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 4: OSI Model and Network Protocols
Introduction
The OSI Seven-Layer Model
Physical Layer (Layer 1)
Data Link Layer (Layer 2)
Network Layer (Layer 3)
Transport Layer (Layer 4)
Session Layer (Layer 5)
Presentation Layer (Layer 6)
Application Layer (Layer 7)
OSI Model Summary
Identifying the OSI Layers at Which Various Network Components Operate
Connectionless and Connection-Oriented Protocols
Introduction to 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)
Post Office Protocol Version 3/Internet Message Access Protocol Version 4 (POP3/IMAP4)
Telnet
Secure Shell (SSH)
Internet Control Message Protocol (ICMP)
Address Resolution Protocol (ARP)/Reverse Address Resolution Protocol (RARP)
Network Time Protocol (NTP)
Network News Transfer Protocol (NNTP)
Secure Copy Protocol (SCP)
Lightweight Directory Access Protocol (LDAP)
Internet Group Management Protocol (IGMP)
Domain Name System (DNS)
Simple Network Management Protocol (SNMP)
Dynamic Host Configuration Protocol (DHCP)
Transport Layer Security
Session Initiation Protocol (SIP)/Real-Time Transport Protocol (RTP)
TCP/IP Protocol Suite Summary
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 5: TCP/IP Routing and Addressing
Introduction
IP Addressing
IPv4
IP Address Classes
Subnet Mask Assignment
Subnetting
Identifying the Differences Between IPv4 Public and Private Networks
Private Address Ranges
Classless Interdomain Routing (CIDR)
Default Gateways
IPv4 Address Types
IPv6 Addressing
Comparing IPv4 and IPv6 Addressing
Assigning IP Addresses
Static Addressing
Dynamic Addressing
BOOT Protocol (BOOTP)
APIPA
Identifying MAC Addresses
NAT, PAT, and SNAT
Network Address Translation (NAT)
PAT and SNAT
TCP/UDP Port Functions
Managing TCP/IP Routing
The Default Gateway
Routing Tables
Static Routing
Dynamic Routing
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 6: WAN Technologies and Internet Access
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
Internet Access Technologies
xDSL Internet Access
Cable Internet Access
Broadband Security Considerations
POTS Internet Access
The Public Switched Telephone Network (PSTN)
Satellite Internet Access
Wireless Internet Access
MPLS
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 7: Wireless Networking
Introduction
Wireless Access Points
Working with APs
Wireless Antennas
Antenna Ratings
Antenna Coverage
Wireless Radio Channels
Data Rate Versus Throughput
Factors Affecting Wireless Signals
Interference Types
Spread-Spectrum Technology
Orthogonal Frequency Division Multiplexing
Beacon Management Frame
802.11 Wireless Standards
The Magic Behind 802.11n
Summary of 802.11 Wireless Standards
Securing Wireless Networks
Wired Equivalent Privacy (WEP)
Wi-Fi Protected Access (WPA)
802.1X
Temporal Key Integrity Protocol
Establishing Communications Between Wireless Devices
Configuring the Wireless Connection
Access Point Coverage
Wireless Signal Quality
Wireless Troubleshooting Checklist
Infrared Wireless Networking
Bluetooth
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 8: Network Performance Optimization
Introduction
What Is Uptime?
The Risks
Fault Tolerance
Disk-Level Fault Tolerance
Server and Services Fault Tolerance
Link Redundancy
Using Uninterruptible Power Supplies
Disaster Recovery
Full Backup
Differential Backup
Incremental Backup
Tape Rotations
Backup Best Practices
Hot and Cold Spares
Hot, Warm, and Cold Sites
Network Optimization Strategies
QoS
Traffic Shaping
Caching Engines
Working with Command-Line Utilities
Troubleshooting with Diagnostic Utilities
The Trace Route Utility (tracert/traceroute)
ping
ARP
The netstat Command
nbtstat
The ipconfig
ifconfig
nslookup
dig
mtr
The host
The route Utility
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 9: Network Security
Introduction
Firewalls
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
Honeypots and Honeynets
Access Control Overview
Mandatory Access Control (MAC)
Discretionary Access Control (DAC)
Rule-Based Access Control (RBAC)
Role-Based Access Control (RoBAC)
MAC Filtering
TCP/IP Filtering
Tunneling and Encryption
Point-to-Point Tunneling Protocol (PPTP)
Layer 2 Tunneling Protocol (L2TP)
IPSec
Remote-Access Protocols and Services
Remote Access Service (RAS)
SLIP
PPP
PPPoE
Remote-Control Protocols
Authentication, Authorization, and Accounting (AAA)
Passwords and Password Policies
Kerberos Authentication
Public Key Infrastructure
RADIUS and TACACS+
Remote Authentication Protocols
Physical Security
Server Room Access
Secured Versus Unsecured Protocols
Managing Common Security Threats
More on Viruses
More on Worms and Trojan Horses
Denial of Service and Distributed Denial of Service Attacks
Other Common Attacks
An Ounce of Prevention
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Chapter 10: Network Management Tools and Documentation
Introduction
Documentation Management
Wiring Schematics
Physical and Logical Network Diagrams
Baselines
Policies, Procedures, Configurations, and Regulations
Monitoring Network Performance
Common Reasons to Monitor Networks
Packet Sniffers
Throughput Testing
Port Scanners
Network Performance, Load, and Stress Testing
Tracking Event Logs
Networking Tools
Wire Crimpers, Strippers, and Snips
Voltage Event Recorder
Temperature Monitors
Toner Probes
Protocol Analyzer
Media/Cable Testers
TDR and OTDR
Multimeter
Network Qualification Tester
Butt Set
Wireless Detection
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Questions
Need to Know More?
Chapter 11: Troubleshooting and Supporting the Network
Introduction
Troubleshooting Steps and Procedures
Information Gathering: Identify Symptoms and Problems
Identify the Affected Areas of the Network
Determine if Anything Has Changed
Establish the Most Probable Cause
Determine if Escalation Is Necessary
Create an Action Plan and Solution Identifying Potential Effects
Implement and Test the Solution
Identify the Results and Effects of the Solution
Document the Solution and the Entire Process
Troubleshooting the Network
Troubleshooting Wiring
Wiring Issues
Troubleshooting Infrastructure Hardware
Configuring and Troubleshooting Client Connectivity
Troubleshooting an Incorrect VLAN
Topology Errors
Star Topology
Ring Topology
Bus Network Errors
Mesh Network Errors
Issue Escalation
Review and Test Yourself
The Facts
Key Terms
Exam Prep Questions
Answers to Exam Prep Questions
Need to Know More?
Practice Exam 1
Answers at a Glance
Answers and Explanations
Practice Exam 2
Answers to Practice Exam 2
Answers at a Glance
Answers and Explanations
Glossary
Index
