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This lesson covers wireless networking technologies, including WiFi standards, Bluetooth, frequency bands, SSIDs, WPA2/WPA3, and security considerations. These topics are part of the OCR H446 specification.
Wireless networking uses radio waves (or infrared) to transmit data between devices, eliminating the need for physical cables. The most common wireless networking technology is WiFi (Wireless Fidelity), based on the IEEE 802.11 standards.
The IEEE 802.11 family defines wireless networking standards. Each generation improves speed, range, and capacity.
| Standard | Name | Max Speed | Frequency | Year |
|---|---|---|---|---|
| 802.11a | — | 54 Mbps | 5 GHz | 1999 |
| 802.11b | — | 11 Mbps | 2.4 GHz | 1999 |
| 802.11g | — | 54 Mbps | 2.4 GHz | 2003 |
| 802.11n | WiFi 4 | 600 Mbps | 2.4 / 5 GHz | 2009 |
| 802.11ac | WiFi 5 | 3.5 Gbps | 5 GHz | 2013 |
| 802.11ax | WiFi 6 | 9.6 Gbps | 2.4 / 5 / 6 GHz | 2020 |
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