related standards.
Firewall
A firewall is a software or hardware application installed on computer to
block unauthorized access to the computer. It is essential in protecting
private information in current days. Four popular types of firewall include
packet filtering, application gateways, circuit-level gateways, and proxy
servers.
Focal Length
The focal length is defined as the distance i from the optical center of the
lens to the focal point in mm unit of measurement. A lower focal length
results in less magnification with a greater field of view, and vice versa for
longer focal lengths. Security cameras usually have a focal length of ¼ ”, 1/3”,
or ½ ”.
fps
It is the abbreviation of frames per second. In the field of video
surveillance, fps means the number of frames an IP camera is able to
capture per second.
Frame
One complete picture. A frame contains 525 lines (NTSC) or 625 lines
(PAL).
FTP
It is the abbreviation of File Transfer Protocol. FTP is a standard,
client/server network protocol, used to exchange and manipulate files over
a TCP/IP based network.
G
GUI
This is the abbreviation of Graphical User Interface. GUI is a graphical
(rather than purely textual) user interface between a computer and the
matrix switcher. Pronounced as ‘gooey’, this is the interface between the
computer and the matrix switcher.
