D-Link DSM-260 Quick Installation Manual page 6

A - WAN Mode
WAN Mode - If you want to stream content from the Internet
(e.g., stream a video from YouTube) to your TV, use this mode.
The DSM-260 and your mobile devices must connect to your
wireless router.
B - Wi-Fi Hotspot Mode
Wi-Fi Hotspot Mode (default) - This mode allows you to
connect wirelessly from the DSM-260 to your laptop or mobile
device and stream local content to your TV. If you need an
Internet connection, use WAN Mode.
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DSM-260