STP Questions

1. 1Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three)

   

   1. ASwitch A – Fa0/0
   2. BSwitch A – Fa0/1
   3. CSwitch B – Fa0/0
   4. DSwitch B – Fa0/1
   5. ESwitch C – Fa0/0
   6. FSwitch C – Fa0/1
2. 2What value is primarily used to determine which port becomes the root port on each non-root switch in a spanning-tree topology?

   1. Alowest port MAC address
   2. Bport priority number and MAC address.
   3. CVTP revision number
   4. Dhighest port priority number.
   5. Epath cost
3. 3What is one benefit of PVST+?

   1. APVST+ reduces the CPU cycles for all the switches in the network.
   2. BPVST+ automatically selects the root bridge location, to provide optimization.
   3. CPVST+ allows the root switch location to be optimized per vlan.
   4. DPVST+ supports Layer 3 load balancing without loops.
4. 4Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network? (Choose two)

   1. A802.1d
   2. BVTP
   3. C802.1q
   4. DSTP
   5. ESAP
5. 5In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

   1. Aafter broken links are re-established
   2. Bin an improperly implemented redundant topology
   3. Cwhen upper-layer protocols require high reliability
   4. Dduring high traffic periods
   5. Ewhen a dual ring topology is in use
6. 6Refer to the exhibit. A problem with network connectivity has been observed. It is suspected that the cable connected to switch port Fa0/9 on Switch1 is disconnected. What would be an effect of this cable being disconnected?

   1. AHost B would not be able to access the server in VLAN9 until the cable is reconnected.
   2. BCommunication between VLAN3 and the other VLANs would be disabled.
   3. CThe transfer of files from Host B to the server in VLAN9 would be significantly slower.
   4. DFor less than a minute, Host B would not be able to access the server in VLAN9. Then normal network function would resume.
7. 7Which port state is introduced by Rapid-PVST?

   1. Alearning
   2. Blistening
   3. Cdiscarding
   4. Dforwarding
8. 8Refer to the exhibit. Based on the information given, which switch will be elected root bridge and why?

   

   1. ASwitch A, because it has the lowest MAC address
   2. BSwitch A, because it is the most centrally located switch
   3. CSwitch B, because it has the highest MAC address
   4. DSwitch C, because it is the most centrally located switch
   5. ESwitch C, because it has the lowest priority
   6. FSwitch D, because it has the highest priority
9. 9Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?

   1. Aredundant
   2. Bspanned
   3. Cprovisioned
   4. Dconverged
10. 10Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the most likely reason that interface FastEthernet 0/10 is not the root port for VLAN 2?

    

    1. AThis switch has more than one interface connected to the root network segment in VLAN 2.
    2. BThis switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.
    3. CThis switch interface has a higher path cost to the root bridge than another in the topology.
    4. DThis switch has a lower bridge ID for VLAN 2 than the elected designated switch.

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Certificate CCNA (ICND1) Quiz on STP Questions, created by David Jimenez on 05/05/2016.

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David Jimenez

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