Network A has a spanning-tree problem in which the traffic is selecting a longer path. How is the
path cost calculated?
A.
Number of hops
B.
Priority of the bridge
C.
Interface bandwidth
D.
Interface delay
E.
None of the above
Explanation:
STP Path Cost Automatically Changes When a Port Speed/Duplex Is Changed 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.http://www.cisco.com/en/US/tech/tk389/tk621/technologies_configuration_example09186a008009
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