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Which two NHRP functions are specific to DMVPN Phase 3 implementation? (Choose two.)

A.

registration reply

Answers
A.

registration reply

B.

redirect

Answers
B.

redirect

C.

resolution reply

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C.

resolution reply

D.

registration request

Answers
D.

registration request

E.

resolution request

Answers
E.

resolution request

Suggested answer: B, C

Explanation:

NHRP redirect is a function that allows the hub to inform the source spoke of a better path to reach thedestination spoke, by sending an NHRP redirect message containing the IP address of the destinationspoke.This triggers the source spoke to send an NHRP resolution request to the destination spoke, inorder to establish a direct spoke-to-spoke tunnel1.NHRP resolution reply is a function that allows the destination spoke to respond to the NHRP resolutionrequest from the source spoke, by sending an NHRP resolution reply containing its own IP address andthe IP address of the source spoke.This confirms the establishment of the direct spoke-to-spoke tunnel,and also allows the destination spoke to create a reciprocal tunnel to the source spoke2.These two functions are specific to DMVPN Phase 3, because they enable spoke-to-spokecommunication without requiring a dynamic routing protocol or going through the hub.In DMVPN Phase1 and Phase 2, NHRP registration request, registration reply, and resolution request are also used, butthey have different purposes and effects3.

asked 10/10/2024
Armindo Malafaia Neto
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