Glossary - Sony NAS-CZ1 Mode D'emploi

Glossary

ADSL
Abbreviation of Asymmetric Digital Subscriber
Line. ADSL is one kind of broadband line. It
relies on the conventional copper wires of
telephone lines but supports transmission of
large amounts of data by using the high-
frequency bandwidth separate from audio
signals. The upstream rate of communication
(for data sent from the user's terminal) is slower
than the downstream rate (sent from the provider
to the user's terminal), hence the description
"asymmetric". Transmission speeds vary
depending on the contracted service.
Broadband
General name for communication lines that use
a broad frequency bandwidth for sending and
receiving large amounts of video or audio data at
high speed. Currently, ADSL, CATV, FTTH
and other systems are identified as broadband.
Broadband router
For Internet connections through ADSL or a
cable TV line, devices called ADSL modems or
cable modems are used. However, for Internet
access from multiple terminals connected at
once, a broadband router is used.
DHCP
Abbreviation of Dynamic Host Configuration
Protocol. A system for automatically allocating
configuration data required for an Internet
connection.
DLNA
Abbreviation of Digital Living Network
Alliance. The DLNA is a nonprofit organization
that establishes design guidelines for digital
content shared over networks.
For details, see http://www.dlna.org/.
Ethernet
A method of networking computers in a Local
Area Network (LAN). Developed by Xerox
Corporation, Ethernet has become a very
popular means of creating LANs.
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Internet
A communication network linking computers
around the world. The Internet supports many
services, including email and search engines.
This system cannot connect directly to the
internet.
IP address
IP addresses usually comprise four groups of up
to three digits each, separated by a period (such
as 192.168.239.1). All devices on a network
must have an IP address.
ISP
An Internet service provider. Called as an
"Internet Service Provider (ISP)". Companies
that provide a connection to the Internet.
LAN
Abbreviation of Local Area Network.
LAN is a general name for networks set up for
communication among devices including
computers, printers, and fax machines in
relatively small areas such as offices or
buildings.
Router
A device that bridges networks, converting the
protocols and addresses of each network.
Recently, dial-up routers for connecting to
ISDN lines and broadband routers for ADSL
and CATV networks have been introduced. The
term "router" by itself may refer to any of these
devices.
Sampling frequency
When audio sources are converted from analog
to digital data, they must be changed into
numbers (digitized). This process is called
sampling, and the sampling frequency refers to
the number of times per second that the signals
are measured for the recording.
Music CDs are sampled at 44,100 times per
second, so the sampling frequency is expressed
as 44.1 kHz. Generally, the higher the sampling
frequency, the higher the fidelity of the
recording.
Subnet mask
Part of an IP address that identifies the subnet, a
smaller group on the network.