Network Protocols for Video Surveillance


Remote surveillance is the widely used marketing rather than technical term in CCTV engineering & most of the equipment’s are marketed & sold using this term. It is the matter of fact that the CCTV & surveillance systems can be connected to the internet using the available network ports on the devices & equipment’s.

Among the CCTV hardware, the web server is the basic requirement for connecting any CCTV camera or related video surveillance equipment to internet or intranet & rest are the Internet protocols. Each protocol has specific function during & after the connection, IP CCTV cameras; NVR’s & modern DVR’s have built-in web servers. The most important protocols in transmission of Video, Audio & Data over the internet are

HTTP Hyper Text Transmission Protocol This is the logical link between nodes & the texts for the transfer of hypertext’s. Generally we refer it as the request response protocol between client & the server.
TCP     Transmission Control Protocol This provides the communication service between the application program & the internet protocol i.e. connectivity at the transport level.
IP Internet Protocol This enables inter-working & is the major communication protocol for relaying the basic units associated with the packet switched networks.
UDP User Datagram Protocol This is used to send the data without prior communications to setup the specific data paths. It is transaction oriented, simple & stateless, unidirectional & broadcast type.
DHCP Dynamic Host Configuration Protocol This enables dynamic distribution of the network configuration parameters, Hence eliminates use of manual configuration. It operates on basis of client server model.
SMTP Simple Mail Transfer Protocol This is used for sending & receiving an email.
FTP File Transfer Protocol This enables to transfer the files from one host to other over the TCP network and is built on the client-server architecture.
UPnP Universal Plug and Play This enables networked devices to discover each other’s presence on the network so that data sharing is possible.
RTSP Real Time Streaming Protocol This enables to control the streaming media servers by establishing & controlling the media sessions between the end points.
TFTP Trivial File Transfer Protocol This enables the client to put or get the files from the remote host, and is widely used at the initial stages for devices booting from the LAN’s.
NTP Network Time Protocol This enables the synchronization of the clock over the packet switched variable latency data networks. It is used in peer to peer as well as client server models.

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