some of the higher end routers have an extra radio specifically for scanning. Ie: see Cisco https://meraki.cisco.com/product/wi-fi/indoor-access-points/mr44/

some of the higher end routers have an extra radio specifically for scanning. Ie: see Cisco https://meraki.cisco.com/product/wi-fi/indoor-access-points/mr44/ https://meraki.cisco.com/product/wi-fi/indoor-access-points/... This thing will scan channels, as well as perform security operations.