A network technician is troubleshooting connectivity issues in a company's wireless network. Users in the marketing department, which is relatively crowded with wireless devices, are experiencing slow and inconsistent wireless connections. Upon investigation, the technician notes that multiple access points are operating on closely adjacent channels, causing potential co-channel interference. Which of the following actions would best mitigate the issue?
Decrease the transmitting power of the access points to minimize the range of interference.
Implement Quality of Service (QoS) to prioritize marketing department's traffic.
Reconfigure the access points to utilize non-overlapping channels, such as channels 1, 6, and 11, wherever possible.
Separate the marketing department's devices onto different VLANs to alleviate the network congestion.