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CCNP Practical Studies: Troubleshooting by Donna L. Harrington

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Chapter 10's Review Questions

1: The following output was captured during Trouble Ticket 6. Why is fa0/9 in a blocking state?
kentnarrows#show spanning-tree vlan 1
									Spanning tree 1 is executing the IEEE compatible Spanning Tree protocol
  Bridge Identifier has priority 32768, address 00d0.7968.8484
  Configured hello time 2, max age 20, forward delay 15
  Current root has priority 32768, address 0090.922a.7680
  Root port is 24, cost of root path is 19
  Topology change flag not set, detected flag not set, changes 1
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0
Interface Fa0/1 (port 13) in Spanning tree 1 is down Port path cost 100, Port priority 128 Designated ...

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