Overview
A hands-on course focusing on the technical support of WiFi. Wireless LANs are often seen as simple communications that are simply installed and then left alone to work. This course ensures that delegates will be able to install WiFi networks which work but also enable the delegates to troubleshoot WiFi when it does go wrong.
Prerequisites
Intro to data communications & networking
Delegates will learn how to
By the end of the course delegates will be able to: Compare 802.11 standards. Configure WiFi networks. Troubleshoot WiFi networks using spectrum analysers, Wireshark and other tools. Implement 802.11 security. Perform RF surveys.
Outline
History, standards.
What is RF? Wavelength, Frequency, Amplitude, Phase. Wave behaviour. RF components. Watts, mW, dB, SNR, Link budgets.
Hands on Spectrum analysis. Listing WiFi networks. WiFi connection. inSSIDer.
Radiation envelopes, polar charts, gain, Antenna types. Line of Sight, MIMO.
Hands on Connecting, installing, changing antennae. RSSI values.
802.11-2007, 802.11 post 2007, 802.11 drafts. 802.11 b/g/n.
Hands on WiFi performance measurement.
RF frequency bands, FHSS, DSSS, OFDM. Channels.
Hands on Configuring channels.
Mesh, Access points, distribution systems, SSID.
Hands on AP configuration. Client connection profiles.
CSMA/CA, Management frames, control frames, data frames. Passive scanning, active scanning. Open system authentication. Shared Key authentication. Association. RTS/CTS. Power management.
Hands on Capturing frames, analysing frames.
WiFi client, WLAN architecture: Autonomous, Centralised, distributed. WiFi bridges. WiFi routers. PoE.
Hands on WLAN controllers.
RF interference, multipath, adjacent channels, low SNR, mismatched power. Coverage, capacity.
Basics, Legacy security: WEP, MAC filters, SSID cloaking. PSK, 8021.X/EAP, WPA/WPA2. TKIP/ CCMP encryption. Guest WLANs. Wireless attacks, intrusion monitoring.
Hands on WEP cracking, WPA2 configuration. RADIUS.
Protocol and spectrum analysis, coverage analysis. Site survey tools.
Hands on Performing a site survey.
- Introduction
- RF fundamentals
- Antennas
- 802.11
- Spread Spectrum
- Topologies
- 802.11 MAC
- WiFi architecture
- Troubleshooting
- 802.11 Security
- RF Site surveys
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