Question 1

Q1. Refer to the exhibit. Why has this switch not been elected the root bridge for VLAN1?

Accepted Answer

D. It has a higher bridge ID than the elected root bridge.

Answer

B. It is running RSTP while the elected root bridge is running 802.1d spanning tree.

Answer

A. It has more than one interface that is connected to the root network segment.

Answer

C. It has a higher MAC address than the elected root bridge.

Question 2

Q2. Refer to the exhibit. Which switch provides the spanning-tree designated port role for the network segment that services the printers?

Accepted Answer

C. Switch3

Answer

B.Switch2

Answer

A. Switch1

Answer

D. Switch4

Question 3

Q3. Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?

Accepted Answer

C. Switch4, port fa0/11

Answer

A. Switch3, port fa0/1 and B. Switch3, fa0/12

Answer

D. Switch4, port fa0/2 and E. Switch 3, port Gi0/1

Answer

F. Switch 3, port Gi0/2

Question 4

Q4. Refer to the exhibit. Given the ouput shown from this Cisco Catalyst 2950, what is the reason that interface FastEthernet 0/10 is not the root port for VLAN 2?

Accepted Answer

C. This switch interface has a higher path cost to the root bridge than another in the topology.

Answer

A. This switch has more than one interface connected to the root network segment in VLAN 2.

Answer

B. This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.

Answer

D. This switch has a lower bridge ID for VLAN 2 than the elected designated switch.

Question 5

Q5. Which two of these statements regarding RSTP are correct? (Choose two.)

Accepted Answer

B. RSTP defines new port roles. and E. RSTP is compatible with the original IEEE 802.1D STP.

Answer

D. RSTP is a proprietary implementation of IEEE 802.1D STP.

Answer

C. RSTP defines no new port states.

Answer

A. RSTP cannot operate with PVST+.

Question 6

Q6. Refer to the exhibit. Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces. (Choose three.)

Accepted Answer

A. SwitchA, Fa0/2, designeated; B. SwitchA, Fa0/1, root; and SwitchD, Gi0/2, root

Answer

D. SwitchB, Gi0/1, designated

Answer

C. SwitchB, Gi0/2, root

Answer

E. SwitchC, Fa0/2, root

Question 7

Q7. Which port state is introduced by Rapid-PVST?

Accepted Answer

C. discarding

Answer

A. learning

Answer

D. forwarding

Answer

B. listening

Question 8

Q8. Which two states are the port states when RSTP has converged? (Choose two.)

Accepted Answer

A. discarding and D. forwarding

Answer

E. disabled

Answer

C. learning

Answer

B. listening

Question 9

Q9. Which three statements about RSTP are true? (Choose three.)

Accepted Answer

A. RSTP significantly reduces topology converging time after a link failure., B. RSTP expands the STP port roles by adding the alternate and backup roles., and D. RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

Answer

C. RSTP port states are blocking, discarding, learning, or forwarding.

Answer

F. RSTP uses the same timer-based process as STP on point-to-point links.

Answer

E. RSTP also uses the STP proposal-agreement sequence.

Question 10

Q10. Which layer of the OSI model is RSTP used to prevent loops?

Accepted Answer

B. data link

Answer

D. transport

Answer

A. physical

Answer

C. network

Question 11

Q11. What is one benefit of PVST+?

Accepted Answer

C. PVST+ allows the root switch location to be optimized per VLAN.

Answer

D. PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.

Answer

A. PVST+ supports Layer 3 load balancing without loops.

Answer

B. PVST+ reduces the CPU cycles for all the switches in the network.

Question 12

Q12. Which three statements are typical characteristics of VLAN arrangements? (Choose three.)

Accepted Answer

B. Connectivity between VLANs requires a Layer 3 device., D. Each VLAN uses a separate address space., and E. A switch maintains a separate bridging table for each VLAN.

Answer

F. VLANs cannot span multiple switches.

Answer

C. VLANs typically decrease the number of collision domains.

Answer

A. A new switch has no VLANs configured.

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