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Computing (FOLDOC) dictionary
Inverse Address Resolution Protocol
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networking, protocol (InARP) Additions to ARP typically
used for Frame Relay. [Any other examples of its use?]
Frame Relay stations route frames of a higher level
protocol between LANs, across a Permanent Virtual Circuit.
These stations are identified by their Data Link ControlIdentifier (DLCI), equivalent to an Ethernet address in a
LAN itself.
InARP allows a station to determine a protocol address (e.g.
IP address) from a DLCI. This is useful if a new virtualcircuit becomes available. Signalling messages announce its
DLCI, but without the corresponding protocol address it is
unusable: no frames can be routed to it.