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Linksys Official Support - What is a Tri-Band Router and how does it work?
Dual-Band vs Tri-Band Router: Which One Is Best For Your Home?
What are the advantages of a dual-band router? - Quora
Amazon.com: AC1200 WiFi Router Dual Band Wireless Internet Router,High Speed Wireless Router with 4x5dBi High-Gain Antennas for Online Game & HD Video,Provide More Reliable WiFi Connections and WiFi Speeds : Electronics