Spanning Tree Protocol calculates path cost based on which of these?

The correct answer is A. interface bandwidth. STP calculates the path cost based on the media speed (bandwidth) of the links between switches and the port cost of each port forwarding frame. Spanning tree selects the root port based on the path cost. The port with the lowest path cost to the root bridge becomes the root…

Layer 2 Technologies

Question

Exhibit

Options

Ainterface bandwidth
Binterface delay
Cinterface bandwidth and delay
Dhop count
Ebridge priority

How the community answered

(16 responses)

A
88% (14)
C
6% (1)
D
6% (1)

Explanation

STP calculates the path cost based on the media speed (bandwidth) of the links between switches and the port cost of each port forwarding frame. Spanning tree selects the root port based on the path cost. The port with the lowest path cost to the root bridge becomes the root port. The root port is always in the forwarding state. If the speed/duplex of the port is changed, spanning tree recalculates the path cost automatically. A change in the path cost can change the spanning tree topology. Data rate and STP path cost The table below shows the default cost of an interface for a given data rate.

Topics

#STP#path cost#interface bandwidth#spanning tree

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