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Appendix C: Glossary
Appendix C: Glossary
802.11b: The 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: 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 (Domain Name System): 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 (Denial of Service): A hacker attack designed to prevent your computer or network from
operating or communicating.
DSL (Digital Subscriber Line): A technology that allows data to be sent or received over
existing traditional phone lines.
ISP (Internet Service Provider): 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 Service Set Identification 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 (Wired Equivalent Privacy): 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 802.11b wireless networking standard, given by the Wireless
Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry standards group
promoting interoperability among 802.11b devices.
WLAN (Wireless Local Area Network): A group of computers and associated devices
communicate with each other wirelessly, which network serving users are limited in a local area.
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