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Question 51 Discussion

Refer to the exhibit. LAG and MCLAG are used to increase the available network bandwidth and enable redundancy. How does spanning tree protocol see MCLAG and LAG if they are configured based on the physical view shown in the exhibit? (Choose two answers)

  • A. Switch 3 and Switch 4 uplinks are treated as single interfaces.
  • B. Switch 1, Switch 2, and Switch 3 are seen as one MCLAG peer group.
  • C. Switch 3 and Switch 4 are seen as one MCLAG switch client.
  • D. Switch 1 and Switch 2 both seen as one single switch.
Correct Answer: A,D

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Brave-Dumps Admin 2025-11-04 11:18:57

Selected Answers: A, D


LAG (Link Aggregation Group): Combines multiple links into one logical interface — STP sees it as a single port.

MCLAG (Multi-Chassis LAG): Two switches act as one logical switch to downstream devices, providing redundancy without loops.

In the diagram:

Switch 1 and Switch 2 form the MCLAG peer group → STP sees them as one single logical switch.

Switch 3 and Switch 4 connect to the MCLAG pair via aggregated links → STP treats their uplinks as single interfaces.