200-301 Question 179

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• 2

  I think C is also answer

• 2

  why is c wrong?

• 7

  Because the purpose of PortFast is to minimize the time that ports must wait for spanning tree to converge, you should use it only on ports that no other switch is connected to, like access ports for connecting user equipment and servers or on trunk ports when connecting to a router in a router on a stick configuration. If you enable PortFast on a port that is connecting to another switch, you risk creating a spanning tree loop, or with the BPDU guard feature enabled the port will transition in errdisable.