D-Link DIR-868L User Manual page 23

Section 2 - Installation
Step 6
You will be prompted to set up each wireless frequency band in turn;
the 2.4 GHz band followed by the 5 GHz band.
Firstly, enter a network name (SSID) of your choice, or leave it unchanged
to accept the default SSID. Each wireless band can be assigned its own
SSID.
Secondly, choose a Wi-Fi password of at least 8 characters. Any device
trying to connect to the router wirelessly will need to enter this password
the first time it connects.
Finally, tap Next to proceed.
Step 7
Enter the administrator password of your choice. Unlike the Wi-Fi
password, this password is only required when you need to configure
the router. See page 118 for details of when this password is used. Tap Next
to proceed.
D-Link DIR-868L User Manual 19