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wlan_wep — WEP crypto support for 802.11 devices
The wlan_wep module handles the WEP cryptographic requirements of the 802.11 protocol. It does encapsulation and decapsulation of WEP-encoded 802.11 frames and optionally calculates the WEP cipher. The wlan_wep module is an 802.11 cryptographic plugin module for use by the wlan(4) module. This module is automatically loaded if a WEP key is configured with ifconfig(8). Should the underlying network device not be capable of doing the WEP calculations in hardware, the wlan_wep module will do the work.
More information can be found in the IEEE 802.11 Standard.
The wlan_wep driver first appeared in FreeBSD 6.0.