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

Implementing WEP adds per-frame encryption processing and overhead to each transmitted packet, which increases bandwidth consumption rather than reducing it.

Access points continuously transmit beacon frames - typically 10 per second - to advertise the network SSID and synchronize clients. Disabling SSID broadcast stops the AP from including the network name in these frames, reducing the volume of management overhead broadcast across the wireless channel. This decrease in broadcast traffic makes more of the shared wireless medium available for actual data transmission.

Replacing a hub with a switch improves collision domain segmentation on wired Ethernet segments but has no direct effect on wireless LAN bandwidth.

Deploying a more powerful antenna extends the coverage range and signal strength of the WLAN but does not increase or free up channel bandwidth.