CCTV cameras can be categorized based on the type of images they capture, frames per second, and accessories. The main types are indoor, outdoor, IR day/night, dome, bullet, and hidden cameras. A CCTV system has three basic elements - camera, lens, and monitor. Cameras can be connected via daisy chain or star configuration. Storage is needed to save footage. Popular brands include Hikvision, Dahua, Panasonic and Sony. CCTV provides security but has costs and potential privacy issues. Brickwood Security Systems is a CCTV dealer located in Bangalore that provides indoor and outdoor camera solutions.