What are the physical connections on the back panel of the AC1600?

The back panel includes: one USB 2.0 port, one gray DSL port (RJ-11) for ADSL/VDSL connections, four yellow Gigabit Ethernet LAN ports for local network devices, one red Gigabit Ethernet Internet port for cable/fiber modems, a Reset button for factory reset, a Power On/Off button, and a DC power connector. You can use either the DSL port or Internet port for WAN connectivity, but not both simultaneously.