D-Link DSL-2740R User Manual page 35

Section 3 - Configuration
WIRELESS SECURITY Mode
To protect your privacy you can configure wireless security features. This
device supports three wireless security modes including WEP, WPA, and
WPA-Personal. WEP is the original wireless encryption standard. WPA
provides a higher level of security. WPA-Personal does not require an
authentication server.
D-Link DSL-2740R 35