Global WLAN Controllers Market By Type (2 Port WLAN Controllers, 4 Port WLAN Controllers, 6 Port WLAN Controllers, 8 Port WLAN Controllers, 16 Port WLAN Controllers, and 32 Port WLAN Controllers), By Application (Enterprise, and Residential), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028