NetComm NP642 User Manual
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NP642 IEEE 802.11g PCI Adapter
YML785 Rev1
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.