Portfast

Question 1

Enablement of which feature puts the port into err-disabled state when the port has PortFast enabled and it receives BPDUs?
A. BPDU filtering
B. BackboneFast
C. EtherChannel
D. BPDU guard

Answer 1

D. BPDU guard

Question 2

Which feature prevents from sending BPDUs on a Portfast enabled port?
A. BPDU guard
B. PortFast
C. root guard
D. BPDU filtering

Answer 2

D. BPDU filtering

Question 3

Which two statements about PortFast are true? (Choose two)
A. It will skip all spanning-tree states.
B. Only when the port is active when it moves to the forwarding state.
C. It is mostly used when connecting to workstations and servers.
D. It skips the learning state.

Answer 3

C. It is mostly used when connecting to workstations and servers.
D. It skips the learning state.

Question 4

How PortFast works in access and trunk ports? (Choose two)
A. Skip STP (802.1D) timers.
B. State immediately bypassing the listening and learning states.
C. PortFast just can be connected to a workstation or server.
D. The port is put in err-disable if connected in a trunk port.
E. State does not immediately bypassing the listening and learning states.

Answer 4

A. Skip STP (802.1D) timers.

B. State immediately bypassing the listening and learning states.

Question 5

Which two statements about PortFast are true? (Choose two)
A. If forces the port to skip all spanning-tree states
B. The port is error-disabled if it attempts to move into the listening or learning states
C. It allows the port to skip the learning state only
D. The port moves immediately to the forwarding state when a device is connected
E. It is most appropriate for ports that provide connectivity to individual workstations or servers

Answer 5

D. The port moves immediately to the forwarding state when a device is connected
E. It is most appropriate for ports that provide connectivity to individual workstations or servers

Question 6

Which command configures all access ports on a switch to immediately enter the forwarding state when the switch is reset?
A. spanning-tree portfast bpduguard default
B. spanning-tree portfast default
C. spanning-tree portfast
D. spanning-tree portfast bpdufilter default

Answer 6

B. spanning-tree portfast default

Question 7

Which command prevents all access ports on a switch from sending or receiving BPDUs?
A. spanning-tree portfast bpduguard default
B. spanning-tree bpdufilter default
C. spanning-tree bpdufilter enable
D. spanning-tree portfast bpdufilter default

Answer 7

D. spanning-tree portfast bpdufilter default

Question 8

Which statement describes the result of issuing the spanning-tree portfast trunk command under interface configuration mode?
A. The port is allowed to go into the forwarding state immediately regardless of whether the interface is configured as an access or trunk port.
B. The port enters the errdisable state if BPDUs are received.
C. Trunk interfaces can be configured for PortFast.
D. The portfast trunk port immediately replaces the lost root port with an alternate root port.

Answer 8

A. The port is allowed to go into the forwarding state immediately regardless of whether the interface is configured as an access or trunk port.