Which of the following methods will free up bandwidth in a Wireless LAN (WLAN)?

Deploying a more powerful antenna increases signal range and strength but does not reduce bandwidth consumption or management overhead on the WLAN channel.

Replacing a hub with a switch improves wired network performance by eliminating collision domains, but has no direct effect on wireless LAN bandwidth.

When SSID broadcast is disabled, the SSID field is omitted from beacon frames sent by the access point, reducing the size of management frames transmitted continuously on the wireless channel. This decreases management frame overhead, freeing a small amount of the shared wireless medium bandwidth for data traffic.

Implementing WEP adds encryption overhead to each transmitted frame, which increases bandwidth usage rather than freeing it.