CCTV (closed-circuit television) is a TV system in which signals are not publicly distributed but are monitored, primarily for surveillance and security purposes.
CCTV relies on strategic placement of cameras, and observation of the camera's input on monitors somewhere. Because the cameras communicate with monitors and/or video recorders across private coaxial cable runs or wireless communication links, they gain the designation "closed-circuit" to indicate that access to their content is limited by design only to those able to see it.
Cameras on a modern analog CCTV system send their video in the traditional baseband format over coax or UTP cabling back to a digital video recorder (DVR). Here, the video is digitized and stored on hard drives.
Advantages of analog cameras
Analog systems are often less expensive overall
Analog is easier to maintain
Analog cameras can perform better in some environments
Longer cable runs with analog CCTV cameras
View footage in true real time
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).
Benefits of IP camera
Remote administration from any location.
The ability to easily send images and video anywhere with an Internet connection.
Progressive scanning, which enables better quality images extracted from the video, especially for moving targets.
Adjustable frame rates and resolution to meet specific needs.
The ability to send alerts if suspicious activity is detected.
Lower cabling requirements.
Support for intelligent video