
Glossary
BIG-IP® Reference Guide Glossary - 7
internal VLAN
The internal VLAN is a default VLAN on the BIG-IP. In a basic
configuration, this VLAN has the administration ports open. In a normal
configuration, this is a network interface that handles connections from
internal servers.
IPSEC
IPSEC (Internet Security Protocol) is a communications protocol that
provides security for the network layer of the Internet without imposing
requirements on applications running above it.
iQuery
A UDP based protocol used to exchange information between BIG-IP units
and 3-DNS Controllers. The iQuery protocol is officially registered for
port 4353.
last hop
A last hop is the final hop a connection took to get to the BIG-IP. You can
allow the BIG-IP to determine the last hop automatically to send packets
back to the device from which they originated. You can also specify the last
hop manually by making it a member of a last hop pool.
Least Connections mode
Least Connections mode is a dynamic load balancing mode that bases
connection distribution on which server currently manages the fewest open
connections.
link
A link is a physical interface on the BIG-IP connected to another physical
interface in a network.
link aggregation
The link aggregation feature allows you to combine a number of links
together to act as one interface.
load balancing mode
A particular method of determining how to distribute connections across an
array.
loopback adapter
A loopback adapter is a software interface that is not associated with an
actual network card. The nPath routing configuration requires you to
configure loopback adapters on servers.
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