An “Internet Protocol camera” receives control data and sends image data via the network. They Unlike High Definition cameras, do not require no local recording device (DVR).

HD security cameras, are capable of capturing high definition video surveillance footage limited over Megapixels over analog cabling. They also require a HD recorder to capture footage.

Storing surveillance data can be as important to the efficiency of your security system as having the surveillance equipment itself. The more mega pixels requiring more storage space.

Infrared Security Cameras or IR CCTV. Infrared security cameras have the capability to capture video in low light and no light (0 Lux) areas, They can also be limited to a range eg. 10-50meters.

Many security cameras are capable of capturing / recording sound. However, this is rarely done, outside of specialized applications like interview rooms. The most common reason not to record sounds is legal issues.