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Appendix E: Glossary
802.11b -
The IEEE 802.11b standard specifies a wireless networking at 11 Mbps using direct-
sequence spread-spectrum (DSSS) technology and operating in the unlicensed radio spectrum at
2.4GHz, and WEP encryption for security. 802.11b networks are also referred to as Wi-Fi networks.
802.11g
– IEEE
specification for wireless networking at 54 Mbps using direct-sequence spread-
spectrum (DSSS) technology, using OFDM modulation and operating in the unlicensed radio spectrum
at 2.4GHz, and backward compatibility with IEEE 802.11b devices, and WEP encryption for security.
Access Point (AP) -
A wireless LAN transceiver or "base station" that can connect a wired LAN to
one or many wireless devices. Access points can also bridge to each other.
DNS
(
D
omain
N
ame
S
ystem)
–
An Internet Service that translates the names of websites into IP
addresses.
Domain Name -
A descriptive name for an address or group of addresses on the Internet.
DoS
(
D
enial
o
f
S
ervice)
-
A hacker attack designed to prevent your computer or network from
operating or communicating.
DSL
(
D
igital
S
ubscriber
L
ine)
-
A technology that allows data to be sent or received over existing
traditional phone lines.
ISP
(
I
nternet
S
ervice
P
rovider)
-
A company that provides access to the Internet.
MTU
(
Maximum Transmission Unit
)
-
The size in bytes of the largest packet that can be transmitted.
SSID -
A
S
ervice
S
et
Id
entification is a thirty-two character (maximum) alphanumeric key identifying a
wireless local area network. For the wireless devices in a network to communicate with each other, all
devices must be configured with the same SSID. This is typically the configuration parameter for a
wireless PC card. It corresponds to the ESSID in the wireless Access Point and to the wireless
network name.
WEP
(
W
ired
E
quivalent
P
rivacy)
-
A data privacy mechanism based on a 64-bit or 128-bit or 152-bit
shared key algorithm, as described in the IEEE 802.11 standard.
Wi-Fi -
A trade name for the IEEE 802.11b wireless networking standard, given by the Wireless
Ethernet Compatibility Alliance (WECA, see
), an industry standards group
promoting interoperability among IEEE 802.11b devices.
WLAN
(
W
ireless
L
ocal
A
rea
N
etwork)
-
A group of computers and associated devices communicate
with each other wirelessly, which network serving users are limited in a local area.
WPA (Wi-Fi P
rotected
A
ccess
) -
WPA is a security technology for wireless networks that improves on
the authentication and encryption features of WEP (Wired Equivalent Privacy). In fact, WPA was
developed by the networking industry in response to the shortcomings of WEP. One of the key
technologies behind WPA is the Temporal Key Integrity Protocol (TKIP). TKIP addresses the
encryption weaknesses of WEP. Another key component of WPA is built-in authentication that WEP
does not offer. With this feature, WPA provides roughly comparable security to VPN tunneling with
WEP, with the benefit of easier administration and use. This is similar to IEEE 802.1x support and
