D-Link DAP-2553 User Manual page 17

Section 3 - Configuration
Channel Width:
Allows you to select the channel width you would like to operate in. Select 20 MHz if you are not using any 802.11n
wireless clients. Auto 20/40 MHz allows you to connect to both 802.11n and 802.11b/g or 802.11a wireless devices on
your network.
Authentication:
Use the pull-down menu to choose Open System, Shared Key, WPA-Personal, or WPA-Enterprise.
Select Open System to communicate the key across the network.
Select Shared Key to limit communication to only those devices that share the same WEP settings. If multi-SSID is enabled,
this option is not available.
Select WPA-Personal to secure your network using a password and dynamic key changes. No RADIUS server is
required.
Select WPA-Enterprise to secure your network with the inclusion of a RADIUS server.
D-Link DAP-553 User Manual 1