In the network as shown in the figure, all switches run the RSTP protocol. If the E1 interface of SWB failure, the RSTP process is? (Multiple choices)

In the network as shown in the figure, all switches run the RSTP protocol. If the E1 interface of SWB failure, the RSTP process is? (Multiple choices)

A . SWB deletes the port list that use E1 as the destination port in the MAC address table.
B . Recalculate the spanning tree and elect E2 as the new root port.
C . Topology change notification is sent out on all forwarding ports to inform other switch networks that a topology change has occurred.
D . Topology change notification is sent out on all non-edge forwarding ports to inform other switch networks that a topology change has occurred.

Answer: ABD

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