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SMTP server
A server that supports SMTP, currently the most
widely used mail transfer protocol.
SNMP (Simple Network Management Protocol)
A protocol for monitoring and managing networked
communications devices, such as routers, PCs, cam-
eras and Network Disk Recorders via a network.
Subnet mask
Numerical value to define whether to use several bits
for a network address to distinguish among subnet IP
addresses in a network. According to the values,
devices can determine which part of the address is
the network address and which part is the host
address.
Subnet
A small network used as a unit of administration when
a larger network is divided into smaller networks.
Large networks in corporations, for example, the net-
work can be broken down into smaller networks
called "subnets" to make the network more manage-
able and lines used more efficiently. In this case,
these smaller networks are called subnets.
SVGA(Super VGA)
Resolution with 800×600 pixels.
SXVGA
Refers to a resolution of 1280×960 pixels.
TCP/IP (Transmission Control Protocol/Internet
Protocol)
The standard network protocol for the Internet and
Intranets.
Time zone
A time zone is a region or a country that has uniform
standard time.
URL (Uniform Resource Locator)
An address for locating information resources such as
documents and images on the Internet.
USB medium
It is a removable external storage device having the
universal serial bus interface such as a USB memory
stick or an external hard disk.
VGA (Video Graphic Array)
Resolution with 640×480 pixels.
VMD (Motion detection) search
The function that automatically detects motion in
images. In this product, it is possible to search for
date & time of motion detection in recorded images.
VPN
Service used to make public lines as private lines.
Many companies are using this as a new medium of
communication instead of costly private lines.
Depending on service, VPN also provides a secure
line using authentication technology and encryption.
WAN
Allows physically separated PCs, such as between
the head office and a branch office, to connect via a
phone line or private line data for exchanging.
Web browser
A software application which enables to display web
pages. Microsoft Internet Explorer is one of the most
widely used web browser.
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