G
LOSSARY
– 121 –
O
PEN
S
YSTEM
A security option which broadcasts a beacon signal including the access
point’s configured SSID. Wireless clients can read the SSID from the
beacon, and automatically reset their SSID to allow immediate connection
to the nearest access point.
ODFM
Orthogonal Frequency Division Multiplexing: OFDM allows multiple users to
transmit in an allocated band by dividing the bandwidth into many narrow
bandwidth carriers.
R
EPEATER
AND
B
RIDGE
Repeater and bridge can provide an extended link to a remote access point
from the wired LAN. Access Point working in this mode could connect to
another AP in Access Point mode or Repeater and Bridge mode. Whenever
there are two APs having wireless link together (one in Access Point or
Repeater and Bridge mode, another using Repeater and Bridge mode), and
also have wired link separately, these two APs are also working as
“bridging” for the two wired links.
SSID
Service Set Identifier: An identifier that is attached to packets sent over
the wireless LAN and functions as a password for joining a particular radio
cell; i.e., Basic Service Set (BSS).
S
ESSION
K
EY
Session keys are unique to each client, and are used to authenticate a
client connection, and correlate traffic passing between a specific client and
the access point.
S
HARED
K
EY
A shared key can be used to authenticate each client attached to a wireless
network. Shared Key authentication must be used along with the 802.11
Wireless Equivalent Privacy algorithm.
SNTP
Simple Network Time Protocol: SNTP allows a device to set its internal
clock based on periodic updates from a Network Time Protocol (NTP)
server. Updates can be requested from a specific NTP server, or can be
received via broadcasts sent by NTP servers.
TKIP
Temporal Key Integrity Protocol: A data encryption method designed as a
replacement for WEP. TKIP avoids the problems of WEP static keys by
dynamically changing data encryption keys.
TFTP
Trivial File Transfer Protocol: A TCP/IP protocol commonly used for software
downloads.
VAP
Virtual Access Point: Virtual AP technology multiplies the number of Access
Points present within the RF footprint of a single physical access device.
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