Closed-circuit television (CCTV) surveillance is done by the use of video cameras. The signal is transmitted via video cameras to a set of monitors. The links can be mesh wired, wireless, point to point (P2P) or point to multi point (P2MP). The advanced forms of CCTV cameras also use digital video records (DVRs), which provide extra features and performance options. DVRs help with motion detection and email alerts to ensure fool-proof surveillance. Surveillance cameras (CCTV) are majorly used for monitoring employees, traffic monitoring, industrial processes, and crime prevention.