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Exam 300-209 topic 1 question 92 discussion

Actual exam question from Cisco's 300-209
Question #: 92
Topic #: 1
[All 300-209 Questions]

What action does the hub take when it receives a NHRP resolution request from a spoke for a network that exists behind another spoke?

  • A. The hub sends back a resolution reply to the requesting spoke.
  • B. The hub updates its own NHRP mapping.
  • C. The hub forwards the request to the destination spoke.
  • D. The hub waits for the second spoke to send a request so that it can respond to both spokes.
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Suggested Answer: C 🗳️
by Dante8880 at Nov. 18, 2022, 10:16 a.m.

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Dante8880
2 years, 5 months ago
Data traffic from hosts behind Spoke A triggers an NHRP resolution request for Spoke B’s tunnel IP address to be sent through the hub. The hub receives a resolution request and forwards it to Spoke B. Spoke B creates a dynamic spoke-to-spoke tunnel using the source NBMA IP address for Spoke A from the NHRP resolution request and sends an NHRP resolution reply directly to Spoke A. Hubs do not answer NHRP resolution requests on behalf of spokes. Hubs always forward NHRP resolution requests to the end spoke that has the requested tunnel IP address or services the requested data from the host IP address.
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