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Refer to the exhibit. Switch SW3 has a redundant path to a segment on LAN belonging to PC1, which is connected by a Hub. What RSTP port role is f1/2 in switch SW3, if this port applies only when the single switch has two links to the same collision domain?
Forwarding Port
Root Port
Alternate Port
Backup Port
A backup or redundant port is a _backup port into a particular network. This port state happens when the switch is connected to a shared medium _Hub. If the Designated Port f1/1 in switch SW3 fails, then f1/2 will take the role of the new designated port. The alternate port provides a backup of the root port. If the root port fails, the alternate port is allowed to transition into the forwarding state and become the new root port. Alternative Port and Backup port are always in discarding state. For more information refer to: [http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html]
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