Intermec WA21 System Manual page 286

Glossary
272
ARP (Address Resolution Protocol) cache
A table that stores IP addresses and their corresponding MAC addresses.
The access point maintains an ARP cache and can act as an ARP server.
BFSK (Binary Frequency Shift Key)
A broadcasting method that lengthens the range but halves the throughput
as compared to the QFSK method. In access points using an OpenAir
radio, the radio can be configured so that it automatically switches to this
method when the RF protocol determines that throughput is degrading
due to range. The transmit mode parameter determines if BFSK will be
used. The default setting for transmit mode is AUTO, which allows this
automatic switching to occur.
broadcast
A type of transmission in which a message sent from the host is received
by many devices on the system.
data link tunneling
An access point feature that encapsulates the data into an OWL data
frame. This frame is then forwarded via the Ethernet port to the next
access point on the path and so on until the frame reaches the root access
point or designated bridge. The root access point or designated bridge
unencapsulates the frame and forwards it to the host. When the root access
point or designated bridge receives data on the Ethernet network for an
end device, it reverses this process.
You should only use data link tunneling if you have Ethernet switches that
do not support the IEEE 802.1d requirements for backward learning or if
you are using IP tunnels to provide mobility of other routable protocols.
To enable data link tunneling, disable Ethernet bridging.
designated bridge
Also called a secondary LAN bridge. An access point that is assigned the
role of bridging frames destined for or received from a secondary LAN. A
designated bridge connects a secondary LAN with the primary LAN. In
the access point, the secondary LAN bridge priority parameter determines
if the access point is a candidate to become the designated bridge.
DHCP (Dynamic Host Configuration Protocol)
An Internet standard stack protocol that allows dynamic distribution of IP
address and other configuration information to IP hosts on a network.
Implementation of the DHCP client in Intermec network devices
simplifies installation because the devices automatically receive IP
addresses from a DHCP server on the network.
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