Which are true statements about STP PortFast mode?
A) The port bypasses the normal STP startup process and enters forwarding mode immediately.
B) Special BPDUs are generated to notify the other switches that the port is an access port and any switches connected to it should cause the port to be disabled.
C) It should be used on all switch uplink ports to speed convergence in case of a network failure.
D) It starts the generation of STP TCN BPDU generation in port up/down conditions.
A
Explanation: A) When the PortFast feature is used, the port bypasses the normal STP startup process and enters forwarding mode immediately. PortFast is used to optimize the connection of client devices, such as PCs. PCs will connect to the network immediately, facilitating their startup.
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