The C4000LZ are tested and certified to run on the CenturyLink High-Speed Internet network. Smart Connect - Intelligently selects the fastest Wi-Fi band for every device connection. Smart Connect single wireless network (SSID) -Auto-selects the fastest band for each device. Dynamic QoS - Prioritizes internet traffic by application and device for smoother streaming. 5 Gigabit ports (1 WAN + 4 LAN). Wi-Fi 6 antenna - 2.4 GHz,5 GHz 802.11ax (backwards compatible with 802.11a,b,g,n,ac). Supports fiber speeds up to 2.5 Gbps download,1 Gbps upload