Global Sun Technology Inc WLUD245418S 사용자 설명서

다운로드
페이지 23
 
Product: IEEE 802.11g 54Mbps Wireless USB Dongle 
Model: WL UD 2454 18S0
Multiple Bridge 
– One of the additional AP operating modes offered by 54Mbps 
Access Point, which allows a group of APs that consists of two or more APs to 
connect two or more Ethernet networks or Ethernet enabled clients together. 
The way that multiple bridge setups is based on the topology of Ad-Hoc mode. 
Node:
 A network junction or connection point, typically a computer or 
workstation. 
Packet: 
A unit of data routed between an origin and a destination in a network. 
PLCP: 
Physical layer convergence protocol 
PPDU: 
PLCP protocol data unit 
Preamble Type: 
During transmission, the PSDU shall be appended to a PLCP 
preamble and header to create the PPDU. Two different preambles and headers 
are defined as the mandatory supported long preamble and header which 
interoperates with the current 1 and 2 Mbit/s DSSS specification as described in 
IEEE Std 802.11-1999, and an optional short preamble and header. At the 
receiver, the PLCP preamble and header are processed to aid in demodulation 
and delivery of the PSDU.    The optional short preamble and header is intended 
for application where maximum throughput is desired and interoperability with 
legacy and non-short-preamble capable equipment is not consideration. That is, 
it is expected to be used only in networks of like equipment that can all handle 
the optional mode. (IEEE 802.11b standard) 
PSDU: 
PLCP service data unit 
Roaming: 
A LAN mobile user moves around an ESS and enjoys a continuous 
connection to an Infrastructure network. 
RTS: R
equest TSend. An RS-232 signal sent from the transmitting station to 
the receiving station requesting permission to transmit. 
RTS Threshold: 
Transmitters contending for the medium may not be aware of 
each other. RTS/CTS mechanism can solve this “Hidden Node Problem”. If the 
packet size is smaller than the preset RTS Threshold size, the RTS/CTS 
mechanism will NOT be enabled. 
SSID: 
Service Set Identifier, which is a unique name shared among all clients 
and nodes in a wireless network. The SSID must be identical for each clients 
and nodes in the wireless network. 
Subnet Mask: 
The method used for splitting IP networks into a series of 
sub-groups, or subnets. The mask is a binary pattern that is matched up with the 
IP address to turn part of the host ID address field into a field for subnets. 
TCP/IP: 
Transmission Control Protocol/ Internet Protocol. The basic 
communication language or protocol of the Internet. It can also be used as a 
communications protocol in a private network, i.e. intranet or internet. When you 
        22 
21
GST Confidential