D-Link DWR-116 User Manual page 30

Section 3 - Configuration
Select a level of wireless security to use, then click Next to
continue.
If you chose BEST or BETTER, select whether to use TKIP or
AES encryption, then enter a password to use for your wireless
network. It is recommended that you use AES if your wireless
computers and devices support it, as it is more secure.
Click Next to continue.
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