CCNA 3 – Chapter 2 – Exam Answer 2016 100%

CCNA 3 – Chapter 2 – LAN Redundancy Exam Answer 2016 100%

1.What is an advantage of PVST+?

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

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

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

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

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

4.Fill in the blank.
In FHRP operation, two or more routers are represented as a single virtual router.

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

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

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

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

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

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

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

9.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?

• Rapid PVST+
• MST
• STP
• PVST+

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

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

11.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.)

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

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

• disabled
• learning
• listening
• blocking
• forwarding

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

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

14.Which RSTP ports are connected to end devices?

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

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

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

• learning
• blocking
• listening
• forwarding

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

CCNA 3 – Chapter 2 – LAN Redundancy Exam Answer 2016 100%

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

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

• VRRPv2
• SLB
• HSRP
• GLBP

20.

CCNA 3 – Chapter 2 – LAN Redundancy Exam Answer 2016 100%

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

• GLBP
• VRRP
• FHRP
• HSRP

21.

CCNA 3 – Chapter 2 – LAN Redundancy Exam Answer 2016 100%

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

• 192.168.2.1
• 192.168.2.100
• 192.168.2.0
• 192.168.2.2

22.Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Which switch is the root bridge?

• Switch_2
• Switch_4
• Switch_1
• Switch_3

23.What is the purpose of HSRP?

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