NETGEAR N600 Wireless Dual Band Router WNDR3400v2 - Manual (Page 13)

Hardware Setup
13
N600 Wireless Dual Band Router WNDR3400v2
Back Panel
The back panel has the connections shown in the following figure.
USB port 
Restore Factory Settings button. Press and hold this
button for about 5 seconds to reset the router to its factory
default settings.
WiFi On/Off button 
Four local area network (LAN) 10/100 Mbps Ethernet ports
for connecting the router to your local computers.

Internet/Wide Area Network (WAN) Ethernet port for
connecting the router to a cable or DSL modem.

AC power adapter outlet for connecting the power adapter. 
Power On/Off button.
See Factory Settings on page 110 for information about restoring factory settings.