Wireless Technician

Explore Wi-Fi antennas, their radiation patterns in azimuth and elevation, passive gain and EIRP, and indoor versus outdoor types from omnidirectional to highly directional.

Understand how IEEE drafts and ratifies Wi‑Fi standards (802.11) with amendments like 802.11ax, and how bands 2.4 ghz, 5 ghz, 6 ghz, and 60 ghz enable wireless networks.

Learn the 802.11 physical layers—from DSS to OFDM, ERP, HT, VHT, and HE—and how channel width, modulation, and spatial streams drive data rates across 2.4, 5, and 6 GHz.

This lecture explains wireless channels on 2.4 GHz, 5 GHz, and 6 GHz, highlighting non overlapping 2.4 GHz channels 1, 6, and 11, and 5 GHz widths with radar checks.

Check that client devices support the selected channels per regulatory domain, including 2.4 GHz 1–11 in the US and DFS 5 GHz channels with radar detection.

Explore how co-channel interference arises when two access points share the same channel and overlap, and learn to prevent it by using non overlapping channels such as channel six.

Learn 802.11 networking terminology, including BSS, IBSS, SSID, basic service area, extended service set, and ad hoc networks, with practical explanations of how access points and devices connect.

Identify client devices in wireless networks—laptops, tablets, mobile phones, desktops, and special devices—and review operating systems, security features (peap, eap-tls), and supported bands.

Learn to configure the wireless client driver on Windows, adjusting bandwidth, channel width, quality of service, and wireless mode to connect with the access point.

Configure the supplicant on the end device to connect to wifi, create a network profile for WPA2 personal, and enable automatic connection even for hidden SSIDs.

Compare access point features and capabilities for indoor and outdoor wireless LANs from two vendors, and review spec sheets for bands, antennas, PoE, and security.

Explore how to configure wireless access points, including choosing the band, adjusting power, and setting security, and compare autonomous versus controller-based management, with cloud and local options and privacy implications.

Configure the access point and connect a phone to the ssid training wireless using the password, then verify internet connectivity by pinging 8.8.8.8.

Learn basic wlan security, encryption, and MDM, including when to avoid mac filtering and hide ssid, while guarding against eavesdropping, denial of service attacks, and social engineering.

Explore how authentication, key management, and encryption secure wireless networks, applying the confidentiality, integrity, and availability concepts, and extensible authentication protocol with radius to protect data and prevent eavesdropping.

Learn the CWNP troubleshooting methodology for wireless LAN problems, covering eight steps: identify problem, determine scale, define and narrow causes, plan or escalate, perform corrective actions, verify, and document results.

Identify common wireless connectivity problems, including configuration errors, interference, poor signal strength, coverage gaps, drivers, and supplicant issues, and apply fixes to restore reliable access point connectivity.

Diagnose performance problems by checking configuration errors, avoiding mismatched bands (n vs b), optimizing channels to minimize interference including co-channel interference, and validating data rates.

Identify wireless security problems by checking authentication failures, avoiding WEP, enforcing WPA2 with correct passphrases, and ensuring compatible EAP methods and radius server connections.

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