Learning path
Wireless Networking
Learners who already understand basic wired networking and want to understand how Wi-Fi's shared radio medium changes the rules for addressing, media access, and troubleshooting.
How Wi-Fi actually works over the air: radio frequency bands and channels, access point roles, and the media-access rules that let many devices share one invisible, half-duplex medium.
Modules and lessons
Wireless Fundamentals
The physical and media-access layer concepts every Wi-Fi standard builds on: frequency bands, channels, network roles, and collision avoidance over radio.
Wireless Fundamentals: Radio, Channels, and Media Access
Explain how Wi-Fi uses radio frequency bands and channels, the roles access points and clients play in a basic service set, why CSMA/CA replaces Ethernet's collision detection over a half-duplex radio medium, and how RTS/CTS solves the hidden node problem.
Wi-Fi Security
How Wi-Fi networks authenticate clients and encrypt traffic over the air: the WPA2 4-way handshake, why it's vulnerable to offline dictionary attacks, and how WPA3's SAE fixes that.
Wi-Fi Security: WPA2, WPA3, and the 4-Way Handshake
Explain how WPA2-Personal derives per-session keys from a pre-shared key via the 4-way handshake, why a captured handshake lets an attacker run an offline dictionary attack against the password, how WPA3's SAE (Simultaneous Authentication of Equals) closes that gap, and the difference between Personal and Enterprise authentication.
802.11 Standards and Association
The alphabet soup of 802.11 amendments and Wi-Fi generation names, and the scanning, authentication, and association process every client goes through before it can send a single data frame.
802.11 Standards and the Association Process
Explain what each major 802.11 amendment changed and how Wi-Fi generation names map to them, the difference between passive and active scanning, the states a client moves through from Unauthenticated/Unassociated to Associated, and how 802.11r/k/v support fast roaming between access points.
Wireless Site Design and Roaming
How RF propagation and attenuation shape real-world Wi-Fi coverage, the three kinds of site survey, how AP placement and channel planning balance coverage against interference, and why overlap alone doesn't guarantee smooth roaming.
Wireless Site Design and Roaming
Explain how RF propagation and attenuation shape real-world Wi-Fi coverage, the difference between predictive, passive, and active site surveys, how AP placement and channel planning balance coverage against co-channel interference, and why cell overlap alone doesn't guarantee smooth roaming without client assistance from 802.11k and 802.11v.