D-Link DG-102SP Manual page 34

Using Web-Based Management
Save Changes
After the settings have been saved to NV-RAM, they will become the default
settings for the device, and they will be used every time it is powered on, reset
or rebooted. The only exception to this is a factory reset, which will clear all
settings and restore them to the initial values present when the device was
purchased.
Click on the Save Configuration button at the bottom of the window to save
the system settings to NV-RAM.
Save Changes window
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