81
Table 9.2a Common TCP/IP protocols and ports used for network video.
Protocol
Transport
protocol
Port
Common usage
Network video usage
FTP
(File Transfer
Protocol)
TCP
21
Transfer of files
over the Internet/
intranets
Transfer of images or video from a
network camera/video encoder to an
FTP server or to an application
SMTP
(Send Mail
Transfer
Protocol
TCP
25
Protocol for
sending e-mail
messages
A network camera/video encoder can
send images or alarm notifications
using its built-in e-mail client.
HTTP
(Hyper Text
Transfer
Protocol
TCP
80
Used to browse
the web, i.e. to
retrieve web
pages from web
servers
The most common way to transfer
video from a network camera/video
encoder where the network video
device essentially works as a web
server making the video available for
the requesting user or application
server.
HTTPS
(Hypertext
Transfer
Protocol over
Secure
Socket Layer)
TCP
443
Used to access
web pages
securely using
encryption
technology
Secure transmission of video from
network cameras/video encoders.
RTP
(Real Time
Protocol)
UDP/TCP
Not
defined
RTP standardized
packet format for
delivering audio
and video over
the Internet—
often used in
streaming media
systems or video
conferencing
A common way of transmitting
H.264/MPEG-based network video,
and for synchronizing video and audio
since RTP provides sequential
numbering and timestamping of data
packets, which enable the data
packets to be reassembled in the
correct sequence. Transmission can
be either unicast or multicast.
RTSP
(Real Time
Streaming
Protocol)
TCP
554
Used to set up and control multimedia sessions over RTP
NETWORk TECHNOLOGIES - CHAPTER 9
