33
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Glossary
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Access Point (AP)
A specially configured network device on a
wireless local area network (WLAN). Access
points act as a central transmitter and receiver
of WLAN signals.
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DHCP
Abbreviation for Dynamic Host Configuration
Protocol. A system for automatically
allocating configuration data required for an
Internet connection.
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DLNA
Abbreviation for 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/home/
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DNS
Abbreviation for Domain Name System. A
server that translates domain names to IP
addresses, or IP addresses to domain names. A
DNS is identified by an IP address. Also called
a “DNS server.”
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IP address
IP addresses usually consist of 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.
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LAN
Abbreviation for 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.
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Network key (security key)
An encryption key used to limit the devices
with which communication can occur. It is
used to provide higher security for devices
communicating via a wireless LAN router/
access point.
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Proxy
A program or a server that provides Internet
access to computers within a firewall or
quicker downloading of web pages.
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Router
A device that bridges networks, converting the
protocols and addresses of each network.
When connecting multiple network devices to
the Internet, a router is necessary. The term
“router” by itself may refer to any of these
devices.
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SSID
Abbreviation for Service Set IDentifier. It is a
name that identifies a particular access point
within an IEEE 802.11 wireless LAN. To
connect with an access point, a client device
must be set with the same SSID. SSIDs can be
up to 32 characters long. For higher security, a
network key is normally also used. In this case,
connection cannot occur unless the SSID
matches the network key.
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WEP
Abbreviation for Wired Equivalent Privacy.
An encryption key used in wireless LAN
networks. As an IEEE standard based on RC4
algorithm cryptography, WEP is used to
secure IEEE 802.11b wireless networks.
During the transmission of a message between
a wireless LAN access point and a client
device, the sending side encrypts the data and
the receiving side decrypts it. For
communication to occur, both devices must
use a common code key, which is called the
“WEP key.” The encryption level is indicated
by the bit count of the key; e.g., 64 bits or 128
bits. The higher the bit count, the higher the
security level.
