Course Name
Wireless LANs (802.11) Fundamentals
Course Number
LS 123 110
Course Duration
2 days
Course Description
This course provides an understanding of the Wireless LAN
technologies, applications and standards. Other important topics
such as protocol layers, quality of service, throughput, coverage,
interoperability, interference and security are discussed. Basic RF
theory, propagation, Link budget math, Troubleshooting, WLAN
Security foundations and site survey are explored.
After a general introduction to wireless networks, this practical
course moves quickly into the details of the Wireless LANs
standards (802.11a, 802.11b, 802.11g), 802.11 physical (DSSS and
OFDM), dMAC (Media Access Control), detailed 802.11 framing,
WEP (Wired Equivalent Privacy protocol), WPA/WPA2, TKIP,
802.1x, Enhanced MAC (IEEE 802.11e), 802.11f, 802.11i, QoS
Requirements, Inter-frame Spacing, EDCF Access, HCF for QBSS,
Enhanced Security management operations, and the PCF (point
coordination function) are all covered in detail. Real-world
experiences through case studies and implementation tips located
throughout the course reference material.
Course Objective
After successfully completing the course the students will:
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Understand the basic concepts of 802.11
Be able to understand the technical implementation of
different types of Wireless LANs
Gain a general understanding of Wireless LANs systems
coverage and capacity
Be able to select the most effective wireless LAN type from a
wide assortment of recent and emerging standards.
Examine an Independent assessment of competing wireless
LAN technologies.
Be able to perform a more efficient design and operational
support of wireless LANs because of an understanding of
wireless LAN protocol operations and frame structures.
Target Audience
Anyone who require in-depth knowledge of Wireless LANs and its
connection to current and future mobile and cellular network.
Anyone who needs to implement a wireless extensions to an
existing LAN-Network. Design engineers, field engineers, test
engineers, software and hardware engineers will benefits from the
workshops.
Prerequisites
Basic understanding of wireless, radio communications and IP is
recommended.
Course Modules
 Introduction
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Application and Services
Unlicensed Frequency Bands
802.11 Family of Standards
802.11 Benefits
Wireless LAN Applications
Current Deployments
Wireless Network Design
Wireless Security
Implementation Scenarios and Market Opportunities
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 802.11 Protocol Stack
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The Physical Medium Dependent Layer
The Data Link Layer
The Network Layer
The Transport Layer
 802.11 Physical Layer Procedures
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Physical Layer (PHY) specifications
Channel Spacing, Modulation
Infrared, FHSS, DSSS, OFDM
Physical Layer Architecture
Physical Layer Operations
IEEE 802.11 Frequency Hopping Spread Spectrum (FHSS)
Physical Layer
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IEEE 802.11 Direct Sequence Spread Spectrum (DSSS)
Physical Layer (802.11b)
IEEE 802.11 High Rate Direct Sequence Spread Spectrum
(HR-DSSS) Physical Layer
IEEE 802.11 Orthogonal Frequency Division Multiplexing
(OFDM) Physical Layer (802.11a,g)
 Wireless LAN Medium Access Control (MAC)
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IEEE 802.11 MAC Layer Operations
MAC Frame Structure
802.11 Framing in Detail
MAC Frame Type and Class
Access Methods
Security
Synchronization
Power management
Roaming
QoS on IEEE 802.11
 802.11 Security
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802.11 Security Basics
Standard Defenses
Denial of Service Attacks
Hackers
Intrusion Detection Systems
Network Monitoring
802.11 Threats
Securing 802.11 Networks
Introduction to Crythrography and Encryption
802.11 Authentication & Encryption
Overview of various security technologies, including WEP,
802.1x, LEAP/EAP, and VPNs
Wired Equivalent Privacy (WEP)
WiFi Protected Access (WPA) /WPA2
WEP and TKIP
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802.11i and RSN
EAP Derivatives
Virtual Private Networks (VPNs)
Rogue Detection, IDS, Policy Enforcement
Policy Management
Wireless Policy Violations
AAA and Radius
802.1X Authentication and Access Control
802.1X Key Management
Message Integrity
Three Models of Connectivity
Setting Up the DHCP Server
Setting Up the Routing and Remote Access (VPN) Server
Setting Up IPSec over L2TP
Setting Up the VPN Client
User-specific Security Policies and Roaming across Subnets
Best Practices for a Secure Wireless Solution
Tools and Products
 Planning a Wireless LAN
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Managing a 802.11 Implementation
Requirements Analysis Steps
Types of Wireless LAN Requirements
Defining Wireless LAN Requirements
Analyzing the Feasibility of a Wireless LAN
 802.11 design
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Access Point Locations
Access Point Frequency Assignments
Complete Coverage (no gaps)
Adequate Capacity
Rules of Thumb Don’t Work
Design Based on Extensive Measurements
 Coverage and Capacity
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Propagation and coverage
Complete coverage of target space
Changing environment
Interference sources
Capacity
Enough capacity for expected usage
Consideration of high- and low-density areas Throughput
Network Scenarios
Interworking and coexistence with mobile and cellular
networks
 Implementing a Wireless LAN
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Designing a Wireless LAN
Preparing for Operational Support of a Wireless LAN
Installing a Wireless LAN
 Future Development
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Considerations
Security - WEP, 802.1x, 802.11i
Fragmentation, Equalizers and RAKE Receivers
Installation Options
Performance
Security
Multivendor Operability
QoS Enhancements
Security Enhancements WEP 2
Dynamic Frequency Selection, Transmit Power Control
Upcoming Standards and Future Trends
The evolution of HIPERLAN
The evolution of IEEE 802.11
Forthcoming IR standards
Other RF standards: DECT, Bluetooth, WATM, HomeRF
Integration of WLAN and Cellular (Mobile Networks)
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3GPP Standards and Mobile IP
 Voice over 802.11
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Delivery of Voice-over-IP (VoIP) Services
802.11 and Soft switch
QoS of Wi-Fi and VoIP
Component of Wi-Fi for Reliable, High-quality Voice
Transmission
Real Examples and Applications
 Special Case Study: GPRS/UMTS-802.11 Interworking (Optional)
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Technical Solutions
GPRS Gb – Integration
GPRS Gn / Gr – Integration
IP level integrated solution
Home solution
Operator dependent solution
Independent solution