Cisco 400-051 Exam

When a Cisco IOS gatekeeper receives an LRQ, what is the first step it will take in an attempt to resolve the destination address?

  • A. Check to see if the LRQ reject-unknown-prefix flag is set.
  • B. Check to see if the destination address matches the technology prefix.
  • C. Check to see if the destination address matches the hop-off technology prefix.
  • D. Check to see if the destination address matches the remote zone prefix.
  • E. Check to see if the LRQ forward-queries flag is set.
Answer: Option B.
Explanation: 

LRQ — These messages are exchanged between gatekeepers and are used for inter-zone (remote zone) calls. For example, gatekeeper A receives an ARQ from a local zone gateway requesting call admission for a remote zone device. Gatekeeper A then sends an LRQ message to gatekeeper B. Gatekeeper B replies to the LRQ message with either a Location Confirm (LCF) or Location Reject (LRJ) message, which depends on whether it is configured to admit or reject the inter-zone call request and whether the requested resource is registered.

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