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Cisco Proprietary extensions to the legacy STP (802.1D) such as UplinkFast, BackboneFast, and PortFast are used in order to ________________.

reduce the STP convergence time after a link failure

provide faster port transition from Forwarding to Blocking mode to prevent loops on a switched network

provide faster frame switching

enable the store-and-forward switching method on a Cisco Catalyst switch



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