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6.What happens when there is a topology change on a network that utilizes STP ? (Choose two.)

User traffic is disrupted until recalculation is complete.
The switch recomputes the Spanning Tree topology after the network converges.
All ports are placed in learning state until convergence has occurred.
A delay of up to 50 seconds is incurred for convergence of the new Spanning Tree topology.
User data is forwarded while BPDUs are exchanged to recompute the topology.