CCNA 3 – Chapter 3 – Exam Answer 2016 100%

CCNA 3 – Chapter 3 – Link Aggregation Exam Answer 2016 100%

1.Which three options must match in order to establish an EtherChannel between two directly connected switches? (Choose three.)

• VLAN memberships of the interfaces that are used for EtherChannel
• speed of the interfaces that are used for EtherChannel
• duplex settings of the interfaces that are used for EtherChannel
• port security settings on the interfaces that used for EtherChannel
• port numbers that are used for the EtherChannel
• domain names on the switches

2.What is the most cost-effective method of solving interface congestion that is caused by a high level of traffic between two switches?

• add more VLANs to reduce broadcast domains
• insert a router between the switches
• increase uplink speed
• aggregate ports by using EtherChannel

3.

CCNA 3 – Chapter 3 – Link Aggregation Exam Answer 2016 100%

Refer to the exhibit. Which switching technology would allow each access layer switch link to be aggregated to provide more bandwidth between each Layer 2 switch and the Layer 3 switch?

• PortFast
• EtherChannel
• HSRP
• trunking

4.Which two load balancing methods can be implemented with EtherChannel technology? (Choose two.)

• destination IP to destination MAC
• source IP to destination IP
• destination MAC to source MAC
• destination IP to source IP
• destination MAC to destination IP
• source MAC to destination MAC

5.What is an advantage of using LACP?

• decreases the chance of a spanning-tree loop
• provides a simulated environment for testing link aggregation
• decreases the amount of configuration that is needed on a switch for EtherChannel
• increases redundancy to Layer 3 devices
• allows automatic formation of EtherChannel links

6.Which statement is true regarding the use of PAgP to create EtherChannels?

• It is Cisco proprietary.
• It increases the number of ports that are participating in spanning tree.
• It mandates that an even number of ports (2, 4, 6, etc.) be used for aggregation.
• It requires full duplex.
• It requires more physical links than LACP does.

7.Match the description to the correct command. (Not all options are used.)

Match the description to the correct command. (Not all options are used.)

8.Which statement describes an EtherChannel implementation?

• PAgP cannot be used in conjunction with EtherChannel.
• EtherChannel can support up to a maximum of ten separate links.
• EtherChannel operates only at Layer 2.
• A trunked port can be part of an EtherChannel bundle.

9.Which PAgP mode combination will establish an EtherChannel?

• switch 1 set to desirable; switch 2 set to desirable.
• switch 1 set to auto; switch 2 set to on.
• switch 1 set to on; switch 2 set to desirable.
• switch 1 set to auto; switch 2 set to auto.

10.

CCNA 3 – Chapter 3 – Link Aggregation Exam Answer 2016 100%

Refer to the exhibit. The administrator tried to create an EtherChannel between S1 and the other two switches via the commands that are shown, but was unsuccessful. What is the problem?

• Traffic can only be sent to two different switches if EtherChannel is implemented on Layer 3 switches.
• Traffic cannot be sent to two different switches, but only to two different devices like an
• EtherChannel-enabled server and a switch.
• Traffic can only be sent to two different switches if EtherChannel is implemented on Gigabit Ethernet interfaces.
• Traffic cannot be sent to two different switches through the same EtherChannel link.

11.When a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation?

• auto
• passive
• active
• desirable

12.As the network administrator you have been asked to implement EtherChannel on the corporate network. What does this configuration consist of?

• grouping multiple physical ports to increase bandwidth between two switches
• providing redundant devices to allow traffic to flow in the event of device failure
• providing redundant links that dynamically block or forward traffic
• grouping two devices to share a virtual IP address

13.

CCNA 3 – Chapter 3 – Link Aggregation Exam Answer 2016 100%

Refer to the exhibit. An EtherChannel was configured between switches S1 and S2, but the interfaces do not form an EtherChannel. What is the problem?

• The switch ports were not configured with speed and duplex mode.
• The EtherChannel was not configured with the same allowed range of VLANs on each interface.
• The interface port-channel number has to be different on each switch.
• The switch ports have to be configured as access ports with each port having a VLAN assigned.

14.Which command will initiate EtherChannel interface configuration mode?

• interface port-channel interface-identifier
• interface range interface-identifier
• channel-group group-identifier
• interface interface-identifier

15.What is a best practice to use before beginning an EtherChannel implementation?

• Assign affected interfaces to the management VLAN.
• Enable each of the affected interfaces.
• Assign affected interfaces to an unused VLAN.
• Assign affected interfaces to VLAN 1.
• Shut down each of the affected interfaces.

16.An EtherChannel link using LACP was formed between two switches, S1 and S2. While verifying the configuration, which mode combination could be utilized on both switches?

• S1-passive and S2-passive
• S1-passive and S2-active
• S1-on and S2-passive
• S1-on and S2-active

17.Which two protocols are link aggregation protocols? (Choose two.)

• PAgP
• EtherChannel
• RSTP
• 802.3ad
• STP

18.When a range of ports is being configured for EtherChannel by the use of PAgP, which mode will form the bundled channel only if the port receives PAgP packets from another device?

• auto
• passive
• active
• desirable

19.

CCNA 3 – Chapter 3 – Link Aggregation Exam Answer 2016 100%

Refer to the exhibit. A network administrator has decided that an EtherChannel between ports 0/1 and 0/2 on switches S1 and S2 would help performance. After making the configuration, the administrator notices no performance gain. Based on the output that is shown, what two possible assumptions could a network administrator make? (Choose two.)

• The EtherChannel bundle is not working.
• Switch S2 did not use a compatible EtherChannel mode.
• LACP and PAgP were both used to form the EtherChannel.
• Switch S2 must be configured so that the maximum number of port channels is increased.
• The EtherChannel bundle is working.
• One of the ports on S2 was not configured correctly.

20.Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What are two reasons why the ping messages that are issued from Laptop0 towards Laptop1 are failing? (Choose two.)

• The wrong cable types are connecting the two switches.
• The channel group should be configured as a trunk on each switch.
• The two interfaces on each of the switches belong to different VLANs.
• The channel group mode is not set correctly on the switches.
• The interface VLAN 1 is shut down on both switches.

21.The trunk link between two 2960 switches has reached its capacity. How can this be addressed in the most economical way?

• Combine physical ports into a high-speed logical link by configuring EtherChannel.
• Increase the speed of the ports.
• Decrease the size of the inter-switch collision domain by configuring additional VLANs.
• Create additional broadcast domains by inserting a router between the switches.

22.A network administrator is configuring an EtherChannel link between switches SW1 and SW2 by using the command SW1(config-if-range)# channel-group 1 mode passive. Which command must be used on SW2 to enable this EtherChannel?

• SW2(config-if-range)# channel-group 1 mode desirable
• SW2(config-if-range)# channel-group 1 mode auto
• SW2(config-if-range)# channel-group 1 mode passive
• SW2(config-if-range)# channel-group 1 mode active

23.Which statement describes a characteristic of EtherChannel?

• It can combine up to a maximum of 4 physical links.
• It can bundle mixed types of 100 Mb/s and 1Gb/s Ethernet links.
• It consists of multiple parallel links between a switch and a router.
• It is made by combining multiple physical links that are seen as one link between two switches.

24.What are two advantages of using LACP? (Choose two.)

• allows use of multivendor devices
• increases redundancy to Layer 3 devices
• eliminates the need for the spanning-tree protocol
• allows automatic formation of EtherChannel links
• provides a simulated environment for testing link aggregation
• decreases the amount of configuration that is needed on a switch for EtherChannel