What are the four spanning port states?

• Blocking

• Listening

• Learning

• Forwarding

• Disabled

that is five state 

disable( D to B take20 second)

blocking

lesning(15 second)

lerning(15 second)

forwording

total50 second

Blocking

• Listening

• Learning

• Forwarding

• Disabled

Dear here are the four main steps for STP:

• Blocking

• Listening

• Learning

• Forwarding

• Disabledusually takes40-45 seconds for transition to next step.only a new STP called RSTP :rapid spanning tree protocol around30 seconds for more info :www.cisco.com 

1.Blocking2.Listening3.Learning4.Forwarding 

And it Total Takes45-50 seconds.

desable,blocking ,listening ,learning ,forwarding