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N
T
ETWORK
IME
P
(NTP)
ROTOCOL
O
S
PEN
YSTEM
O
RTHOGONAL
F
D
REQUENCY
IVISION
M
(ODFM)
ULTIPLEXING
S
S
I
ERVICE
ET
DENTIFIER
(SSID)
S
K
ESSION
EY
S
K
HARED
EY
S
N
T
IMPLE
ETWORK
IME
P
(SNTP)
ROTOCOL
T
K
EMPORAL
EY
I
P
NTEGRITY
ROTOCOL
(TKIP)
T
F
T
RIVIAL
ILE
RANSFER
P
(TFTP)
ROTOCOL
V
A
P
IRTUAL
CCESS
OINT
(VAP)
NTP provides the mechanisms to synchronize time across the network. The
time servers operate in a hierarchical-master-slave configuration in order
to synchronize local clocks within the subnet and to national time
standards via wire or radio.
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.
OFDM allows multiple users to transmit in an allocated band by dividing the
bandwidth into many narrow bandwidth carriers.
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).
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.
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 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.
A data encryption method designed as a replacement for WEP. TKIP avoids
the problems of WEP static keys by dynamically changing data encryption
keys.
A TCP/IP protocol commonly used for software downloads.
Virtual AP technology multiplies the number of Access Points present within
the RF footprint of a single physical access device. With Virtual AP
technology, WLAN users within the device.s footprint can associate with
what appears to be different access points and their associated network
– 145 –
G
LOSSARY
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