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Course Overview Wi-Fi is the dominant global standard for wireless LANs. A vast number of organisations are benefiting from the cost-effectiveness, mobility and productivity advantages of Wi-Fi solutions. In this course, you gain the skills to deploy, troubleshoot and secure wireless networks. You learn how technology works and how to plan, optimise and extend the network beyond short range. Audience This course is valuable for anyone involved in evaluating, planning, designing or implementing Wi-Fi wireless networks. Course 450, " Introduction to Networking ", is assumed. Skills Gained - Install, configure and troubleshoot a wireless LAN
- Deploy flexible, cost-effective Wi-Fi networks with access points and routers
- Survey, troubleshoot and optimise Wi-Fi LANs for speed and coverage
- Establish large-scale networks with multiple access points and roaming
- Integrate enterprise networks with point-to-point links, bridges and VLANs
- Secure data with wireless encryption standards and virtual private networks
- Restrict access with authentication and firewalls
- Create and connect to public hotspots
Course Outline The Wireless LAN Revolution Advantages of Wi-Fi networks - Mobility
- Flexibility
- Scalability
- Cost
- Compatibility
Installing a basic Wi-Fi network - Configuring adapters and access points
- Establishing shared Internet connections using wireless broadband routers
- Integrating with wired LANs
Wireless Network Fundamentals Choosing Wi-Fi standards - 802.11a, b and g
- Radio bands
- Channels
- Range
- Regulations
- 802.11n
- MIMO
Assessing Wi-Fi operation - Capturing beacons and probes
- Defining authentication and association
- Evaluating spread spectrum techniques
Troubleshooting and Optimisation Performing a site survey - Scanning Wi-Fi channels
- Measuring signal strength
- Attenuation effects of building materials
Eliminating interference - Broadband vs. narrowband
- Detecting adjacent channel interference
- Limiting 802.11b and g interference
Optimising coverage topography - Configuring rate-shifting options
- Controlling transmitter power
- Fine tuning access point deployment
- Increasing coverage with Mesh Networks
Mitigating hidden node problems - Avoiding congestion effects
- Setting RTS/CTS thresholds
Planning and Deploying Large-Scale Networks Extending range with antennas - Comparing antenna characteristics
- Omni
- Yagi
- Parabolic
- Panel
- Selecting appropriate cables and connectors
Deploying multiple access points for extended coverage - Creating the Extended Service Set (ESS)
- Extending the network with repeaters
- Backhaul with 802.16 Wi-Max
- Exploiting site planning software
Integrating with enterprise networks - Point-to-point and multipoint links
- Calculating a Link Budget
- Wireless and workgroup bridges
- Merging with Cisco VLANs
Securing the Network Assessing network vulnerabilities - Employing network analysis tools
- Capturing unencrypted data
Enabling data encryption - Wired Equivalent Privacy (WEP)
- Wi-Fi Protected Access (WPA)
- Temporal Key Integrity Protocol (TKIP)
Ensuring privacy with VPN technologies - Implementing a short-range VPN
- Tunnelling through the wireless LAN
- Configuring the VPN server and client
Restricting Access to Authorised Users Invoking enterprise authentication - Controlling access by MAC address
- Extensible Authentication Protocol (EAP)
- Connecting to a RADIUS server
Configuring a wireless firewall - Restricting outbound access
- Network Address Translation (NAT)
- Enabling DMZ and port forwarding
Increasing Mobile Productivity Building custom multitier applications - Rich-client or browser interfaces
- VS .NET vs. Java micro edition
Assessing application case studies - Mobile inventory applications
- Voice over IP (VoIP) applications
Creating Public Access Points - Finding and connecting to public hotspots
- Setting up a local hotspot
- Identifying payment models
- Authenticating users with captive portals
- Operational support system (OSS) choices
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