THE X3500
Linksys decided to give the X3500 a rather simple look with grey paint and as usual they used hard plastic for the enclosure (perhaps one day we'll see an aluminum modem/router for better looks and heat dissipation).
Typically placed at the top front of the device are the activity LEDs for the 4 Ethernet ports, WPS, wireless, WAN, internet access and power.
The device is perforated on all sides to allow for hot air to exit easier.
Moving at the rear we see the telephone/DSL port, 4 Gigabit (10/100/1000) Ethernet ports, USB port, WPS button, reset switch, DC power in and the on/off switch.
A total of four short rubber feet are placed at the bottom of the X3500 along with two holes for wall mounting.