CCNA 3 Chapter 2 v5.0 Exam Answers 2015 (100%)

CCNA 3 Chapter 2 v5.0 Exam Answers 2015 (100%) PDF Download

1. Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose two.)

   • static default routes
   • implementing VLANs to contain broadcasts
   • redundant links between Layer 2 switches
   • link-state dynamic routing that provides redundant routes
   • removing single points of failure with multiple Layer 2 switches

2. What is a characteristic of a Layer 2 loop?

   • Broadcast frames are forwarded back to the sending switch.
   • The Time-to-Live attribute of a frame is set to infinity.
   • Routers continually forward packets to other routers.
   • A switch is continually forwarding the same unicast frame.

3. What is the outcome of a Layer 2 broadcast storm?

   • Routers will take over the forwarding of frames as switches become congested.
   • New traffic is discarded by the switch because it is unable to be processed.
   • CSMA/CD will cause each host to continue transmitting frames.
   • ARP broadcast requests are returned to the transmitting host.

4. What additional information is contained in the 12-bit extended system ID of a BPDU?

   • MAC address
   • VLAN ID
   • IP address
   • port ID

5. Which three components are combined to form a bridge ID?

   • port ID
   • IP address
   • extended system ID
   • MAC address
   • bridge priority
   • cost

6. Which STP priority configuration would ensure that a switch would always be the root switch?

   • spanning-tree vlan 10 priority 0
   • spanning-tree vlan 10 priority 61440
   • spanning-tree vlan 10 root primary
   • spanning-tree vlan 10 priority 4096

7. Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same physical and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root guard, and loop guard?

   • STP
   • Rapid PVST+
   • PVST+
   • MST

8. Which two types of spanning tree protocols can cause suboptimal traffic flows because they assume only one spanning-tree instance for the entire bridged network? (Choose two.)

   • STP
   • Rapid PVST+
   • PVST+
   • MSTP
   • RSTP

9. What is an advantage of PVST+?

   • PVST+ requires fewer CPU cycles for all the switches in the network.
   • PVST+ reduces bandwidth consumption compared to traditional implementations of STP that use CST.
   • PVST+ optimizes performance on the network through autoselection of the root bridge.
   • PVST+ optimizes performance on the network through load sharing.

10. In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)

    • blocking
    • disabled
    • forwarding
    • learning
    • listening

11. If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?

    • lowest IP address
    • lowest MAC address
    • highest IP address
    • highest MAC address

12. Which RSTP ports are connected to end devices?

    • trunk ports
    • designated ports
    • root ports
    • edge ports

13. A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces?

    • Link types are determined automatically.
    • Link types must be configured with specific port configuration commands.
    • Link types can only be determined if PortFast has been configured.
    • Link types can only be configured on access ports configured with a single VLAN.

14. Which port state will switch ports immediately transition to when configured for PortFast?

    • listening
    • learning
    • forwarding
    • blocking

15. To obtain an overview of the spanning tree status of a switched network, a network engineer issues the show spanning-tree command on a switch. Which two items of information will this command display? (Choose two.)

    • The root bridge BID.
    • The role of the ports in all VLANs.
    • The status of native VLAN ports.
    • The number of broadcasts received on each root port.
    • The IP address of the management VLAN interface.

16. What is the purpose of HSRP?

    • It provides a continuous network connection when a router fails.
    • It prevents a rogue switch from becoming the STP root.
    • It enables an access port to immediately transition to the forwarding state.
    • It prevents malicious hosts from connecting to trunk ports.

17. Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?

    • HSRP
    • VRRPv2
    • GLBP
    • SLB

18. Refer to the exhibit. Which protocol information is being displayed in the output?

    • FHRP
    • GLBP
    • HSRP
    • VRRP

19. Refer to the exhibit. A network engineer is troubleshooting host connectivity on a LAN that uses a first hop redundancy protocol. Which IPv4 gateway address should be configured on the host?

    • 192.168.2.0
    • 192.168.2.1
    • 192.168.2.2
    • 192.168.2.100

20. Fill in the blank. Do not use abbreviations.
    The spanning-tree mode rapid-pvst global configuration command is used to enable Rapid PVST+.

21. Fill in the blank.

    In FHRP operation, two or more routers are represented as a single virtual router.

22. Match the step number to the sequence of stages that occur during the HSRP failover process. (Not all options are used.)

23. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

    Which switch is the root bridge?

    • Switch_1
    • Switch_2
    • Switch_3
    • Switch_4