LevelOne WNC-0200, Руководство пользователя

Страница: 43 / 46

43
Dynamic IP Address ? An IP address that is assigned automatically to a client
station in a TCP/IP network by a DHCP server.
Encryption ? A security method that uses a specific algorithm to alter the data
transmitted, thus prevent others from knowing the information transmitted.
ESS ? ESS stands for “Extended Service Set”. More than one BSS is configured to
become Extended Service Set. LAN mobile users can roam between different BSSs in
an ESS.
ESSID ? The unique identifier that identifies the ESS. In infrastructure
association , the stations use the same ESSID as AP’s to get connected.
Ethernet ? A popular local area data communications network, originally developed
by Xerox Corp., that accepts transmission from computers and terminals. Ethernet
operates on a 10/100 Mbps base transmission rate, using a shielded coaxial cable or
over shielded twisted pair telephone wire.
Fragmentation ? When transmitting a packet over a network medium, sometimes
the packet is broken into several segments, if the size of packet exceeds that allowed
by the network medium.
Fragmentation Threshold –
The Fragmentation Threshold defines the number of
bytes used for the fragmentation boundary for directed messages. The purpose of
"Fragmentation Threshold" is to increase the transfer reliability thru cutting a MAC
Service Data Unit (MSDU) into several MAC Protocol Data Units (MPDU) in smaller
size. The RF transmission can not allow to transmit too big frame size due to the
heavy interference caused by the big size of transmission frame. But if the frame size
is too small, it will create the overhead during the transmission.
Gateway
?
a device that interconnects networks with different, incompatible
communication protocols.
HEX – Hexadecimal, HEX, consists of numbers from 0 – 9 and letters from A – F.
IEEE ? The I nstitute of E lectrical and E lectronics E ngineers, which is the largest
technical professional society that promotes the development and application of
electrotechnology and allied sciences for the benefit of humanity, the advancement of
the profession. The IEEE fosters the development of standards that often become
national and international standards.
Infrastructure ? An infrastructure network is a wireless network or other small
network in which the wireless network devices are made a part of the network through
the Access Point which connects them to the rest of the network.
ISM Band ? The FCC and their counterparts outside of the U.S. have set aside
bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band.
Spectrum in the vicinity of 2.4GHz, in particular, is being made available worldwide.