User's Manual

905U-E Wireless Ethernet Bridge User Manual
Man_905U-E Rev 1.0 Page 40
DSSS Direct-Sequencing Spread-Spectrum.
ECP Encryption Control Protocol. Used to negotiate data encryption over PPP links.
ESA Encapsulating Security Payload. A mechanism which provides confidentiality and
integrity protection to IP datagrams.
FHSS Frequency-Hopping Spread-Spectrum
Fresnel Zone The area around the visual line-of-sight that radio waves spread out into after
they leave the antenna. This area must be clear or else signal strength will weaken.
Infrastructure Mode A client setting providing connectivity to an Access Point (AP). As
compared to Ad-Hoc Mode where PCs communicate directly with each other, clients set in
Infrastructure Mode all pass data through a central AP.
IP Address An IP (Internet Protocol) address is a 32-bit number that identifies each sender or
receiver of information that is sent across the Internet.
IP Spoofing An attack whereby a system attempts to impersonate another system by using its
IP network address.
LCP Link Control Protocol.
MAC Medium Access Control. In a WLAN network card, the MAC is radio controller
protocol.
MAC Spoofing An attack whereby a system attempts to impersonate another system by using
its MAC address.
NAT Network Address Translation. The translation of an IP address used within one
network to a different IP address known within another network.
OSI Open Systems Interconnection. A set of international standards for networking.
PPP Point-to-Point Protocol. PPP Provides a standard method for transporting multi-
protocol datagrams over point-to-point links.
Sniffer A program to capture data from a computer network.
SNMP Simple Network Management Protocol (also see TCP/IP).
SSID Service Set Identifier - wireless network name.
SSL Secure Sockets Layer. A session layer protocol that provides authentication and
confidentiality to applications.
TCP/IP Transmission Control Protocol / Internet Protocol.
Topology Describes how a network is structured.
VPN Virtual Private Network.
WPA Wi-Fi Protected Access. The Wi-Fi Alliance put together WPA as a data encryption
method for 802.11 wireless LANs. WPA is an industry-supported, pre-standard version of
802.11i utilizing the Temporal Key Integrity Protocol (TKIP), which fixes the problems of
WEP, including using dynamic keys. WPA will serve until the 802.11i standard is ratified in
the third quarter of 2003.