What is the purpose of Inverse ARP?

The correct answer is D. to map a known DLCI to an IP address. In Frame Relay, Inverse ARP (Inverse Address Resolution Protocol) solves the problem of a router knowing its DLCI but not knowing the IP address of the remote peer on that virtual circuit. Regular ARP maps a known IP address to a MAC address (used on Ethernet). Inverse ARP works

Implement Wide-Area Networks

Question

What is the purpose of Inverse ARP?

Exhibit

Options

Ato map a known IP address to a MAC address
Bto map a known DLCI to a MAC address
Cto map a known IP address to an IP address
Dto map a known DLCI to an IP address
Eto map a known IP address to a SPID
Fto map a known SPID to a MAC address

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(33 responses)

A
3% (1)
C
3% (1)
D
94% (31)

Explanation

In Frame Relay, Inverse ARP (Inverse Address Resolution Protocol) solves the problem of a router knowing its DLCI but not knowing the IP address of the remote peer on that virtual circuit. Regular ARP maps a known IP address to a MAC address (used on Ethernet). Inverse ARP works in reverse within the Frame Relay context: given a known DLCI (the Layer 2 identifier), it dynamically discovers the corresponding remote IP address. This allows routers to automatically build their Frame Relay map table without static 'frame-relay map' statements.

Topics

#Inverse ARP#Frame Relay#DLCI#IP mapping

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