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Question 179 - 350-401 discussion

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Refer to the exhibit.

What is the result when a switch that is running PVST+ is added to this network?

A.

DSW2 operates in Rapid PVST+ and the new switch operates in PVST+

Answers
A.

DSW2 operates in Rapid PVST+ and the new switch operates in PVST+

B.

Both switches operate in the PVST+ mode

Answers
B.

Both switches operate in the PVST+ mode

C.

Spanning tree is disabled automatically on the network

Answers
C.

Spanning tree is disabled automatically on the network

D.

Both switches operate in the Rapid PVST+ mode.

Answers
D.

Both switches operate in the Rapid PVST+ mode.

Suggested answer: A

Explanation:

From the output we see DSW2 is running in RSTP mode (in fact Rapid PVST+ mode as Cisco does not support RSTP alone). When a new switch running PVST+ mode is added to the topology, they keep running the old STP instances as

RSTP (in fact Rapid PVST+) is compatible with PVST+.

asked 10/10/2024
Roberto Recine
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