An IP camera is a networked digital video camera that transmits data over a Fast Ethernet link. IP cameras (also called "network cameras") are most often used for IP surveillance, a digitized and networked version of closed-circuit television (CCTV).
This make it can stand alone operating & added with many other features, like, wifi enable, audio enable, Pan/Tilt/Zoom direction control enable, web server enable & etc besides that, it is very DIY friendly.
as it has its own IP address for every single cameras, you can easily add or remove cameras from your network & change location (under your router WIFI coverage)
Many 3rd party applications support Foscam IP cameras in wide range of smartphone, like Iphone, Android, Windows mobile, Blackberry, Nokia Symbian & etc
& also many PC/Mac/Linux software support Foscam IP cameras as well
Most common usage for IP cameras are: - Home surveillance - Security reason bundled with Alarm system - Babies / Maids / Pets monitoring - Part of Smart Home system - Shops surveillance (cameras in different location & combine monitor in 1 centre)