Which two statements correctly describe characteristics of the PortFast feature?

Which two statements correctly describe characteristics of the PortFast feature? (Choose two.)
Select 2 response(s).

A.
STP will be disabled on the port.

B.
PortFast can also be configured on trunk ports.

C.
PortFast is required to enable port-based BPDU guard.

D.
PortFast is used for both STP and RSTP host ports.

E.
PortFast is used for STP-only host ports.

Discussion

One Response to “Which two statements correctly describe characteristics of the PortFast feature?”

  1. Edge Ports
    The edge port concept is already well known to Cisco spanning tree users, as it basically corresponds to the PortFast feature. All ports directly connected to end stations cannot create bridging loops in the network. Therefore, the edge port directly transitions to the forwarding state, and skips the listening and learning stages. Neither edge ports nor PortFast enabled ports generate topology changes when the link toggles. An edge port that receives a BPDU immediately loses edge port status and becomes a normal spanning tree port. At this point, there is a user-configured value and an operational value for the edge port state. The Cisco implementation maintains that the PortFast keyword be used for edge port configuration. This makes the transition to RSTP simpler.

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