Panasonic WV-NW484S Setup Manual page 79

Global IP address
The IP address that is assigned to each single
device connected to the Internet. This address is
always used for communications on the Internet.
In contrast to this, there is the private (IP)
address that can be freely assigned on in-
company networks.
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Half duplex
A transmission mode in which data can be
transmitted in both directions but not at the same
time. This is achieved by switching the
transmission direction on a single
communications line.
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Internet
A massive network of PCs comprising inter-
connected networks around the globe. To
participate in the Internet, a contract with an
operator called an "Internet service provider" is
required.
IP address (Internet Protocol Address)
An ID number that is assigned to each single
communication device and PC connected to an
IP network such as the Internet or an Intranet.
Network devices on the Internet must be
assigned unique IP addresses.
IP masquerade (Network Address Port
Translation)
A technology for sharing a single global address
between two or more PCs. IP masquerading
differs with NAT in that translation is performed
down to the TCP/UDP port number to enable a
simultaneous connection from two or more PCs
by a single global address.
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JPEG (Joint Photographic Experts Group)
A compression technique used in the
compression of still image data.
The technique for continuously sending JPEG
images is sometimes called MotionJPEG.
LAN (Local Area Network)
A communications network for connecting PCs,
printers and other network devices in a relatively
small area such as in a building or floor of a
building or campus in which data is transferred.
MAC address (Media Access Control address)
The physical address that is uniquely assigned
to each network device. Data is sent and
received between devices based on this MAC
address.
MPEG-4 (Moving Pictures Experts Group phase
4)
A technique used in the compression of moving
picture data.
Multicast
Broadcasting of the same data from one device
to a selected group of peer devices in a network
NAT (Network Address Translation)
A technology for sharing a single global address
between two or more PCs.
NTP (Network Time Protocol)
A protocol developed to accurately maintain time
of internal clocks for devices connected the
Network.
Plug-in software
A program that adds extra features to a parent
program
PoE (Power over Ethernet)
A technique for supplying power and data
simultaneously over an Ethernet cable. PoE was
standardized in June, 2003 as "IEEE802.3af".
PoE allows cameras and other devices to be
installed in locations that are difficult to supply
with power.
PoE supplied hub
A switching hub that provids PoE functionality.
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