CCNA3 ScaN v6.0 Chapter 2 Exam Answers 2019 2020

Last Updated on February 19, 2020 by Admin

CCNA3 v6.0 Chapter 2 Exam Answers 2019 2020 Full 100%

1. What is a characteristic of VTP?
   •  Switches in VTP client mode store VLAN information in NVRAM.
   •  Switches in VTP transparent mode forward VTP advertisements.
   •  Switches in VTP server mode cannot be updated by switches in VTP client mode.
   •  Switches in VTP transparent mode revert back to VTP server mode after a reboot.

   Explanation: All switches in the same VTP domain forward advertisements to other switches.

2. Which two VTP parameters must be identical on all switches in the network in order to participate in the same VTP domain? (Choose two.)
   •  VTP domain name
   •  VTP revision number
   •  VTP domain password
   •  VTP server mode
   •  VTP client mode
   •  VTP transparent mode

   Explanation: VTP updates are sent to other switches in the same domain with the same password. The configuration revision number is used to determine whether a switch keeps its existing VLAN database or updates it with the new information.

3. Which two events will cause the VTP revision number on a VTP server to change? (Choose two.)
   •  adding VLANs
   •  rebooting the switch
   •  changing the VTP domain name
   •  changing the switch to a VTP client
   •  changing interface VLAN designations

   Explanation: Changing the VTP domain name always resets the VTP revision number to 0. This is an important step in adding switches to an existing VTP domain no matter what VTP mode the switch uses.

4. Given the following configuration, which two statements are true? (Choose two.)

   switch(vlan)# vtp version 2 
   switch(vlan)# vtp mode server 
   switch(vlan)# vtp domain Cisco 
   switch(vlan)# vtp password mypassword

   •  This switch can create, modify, and delete all VLANs within the Cisco domain.
   •  This switch maintains a full list of all VLANs and can create VLANs, but cannot delete or modify existing VLANs.
   •  The password will prevent unauthorized routers from participating in the Cisco domain.
   •  This switch can advertise its VLAN configuration to other switches in the Cisco domain only, but can receive advertisements from other domains.
   •  This switch can send and receive advertisements from only the Cisco domain.

   Explanation: A switch in VTP server mode can create, modify, and delete VLANs as well as transmit that information (if the switch has the highest VTP configuration revision number) to other switches in the same VTP domain.

5. Where is the vlan.dat file stored on a switch?
   •  in RAM
   •  in NVRAM
   •  in flash memory
   •  on the externally attached storage media or internal hard drive

   Explanation: Normal range VLAN configurations are stored within a VLAN database file, called vlan.dat, which is located in the flash memory of the switch.

6. A switch is participating in a VTP domain and configured as a VTP server. The switch needs to propagate VLAN 10 (used by the Manufacturing department) throughout the VTP domain, but does not have any directly connected hosts using that particular VLAN. Which configuration would satisfy this requirement?
   •  interface fa0/24
     switchport mode access
     switchport access vlan 10
     
   •  interface g0/1
     switchport mode trunk
     switchport trunk native vlan 10
     
   •  vlan 10
     name Manufacturing
     exit
     
   •  vtp mode server
     vtp password Manufacturing
     

   Explanation: The best practice to add a VLAN to the VLAN database with no local hosts to be in that VLAN is to configure that VLAN (vlan 10) with its name (name Manufacturing) and use the exit command to complete the configuration. Do not assign any switch interfaces to that VLAN.

7. Which command should the network administrator implement to prevent the transfer of DTP frames between a Cisco switch and a non-Cisco switch?
   •  S1(config-if)# switchport mode trunk
   •  S1(config-if)# switchport nonegotiate
   •  S1(config-if)# switchport mode dynamic desirable
   •  S1(config-if)# switchport mode access
   •  S1(config-if)# switchport trunk allowed vlan none

   Explanation: To prevent DTP frames from being generated by the interface of a Cisco switch, use the S1(config-if)# switchport nonegotiate command. DTP is Cisco proprietary and not usable by other vendors.

8. Under which two occasions should an administrator disable DTP while managing a local area network? (Choose two.)
   •  when connecting a Cisco switch to a non-Cisco switch
   •  when a neighbor switch uses a DTP mode of dynamic auto
   •  when a neighbor switch uses a DTP mode of dynamic desirable
   •  on links that should not be trunking
   •  on links that should dynamically attempt trunking

   Explanation: Cisco best practice recommends disabling DTP on links where trunking is not intended and when a Cisco switch is connected to a non-Cisco switch. DTP is required for dynamic trunk negotiation.

9. Which command displays the encapsulation type, the voice VLAN ID, and the access mode VLAN for the Fa0/1 interface?
   •  show vlan brief
   •  show interfaces Fa0/1 switchport
   •  show mac address-table interface Fa0/1
   •  show interfaces trunk

   Explanation:  The show interfaces switchport command displays the following information for a given port: Switchport Administrative Mode Operational Mode Administrative Trunking Encapsulation Operational Trunking Encapsulation Negotiation of Trunking Access Mode VLAN Trunking Native Mode VLAN Administrative Native VLAN tagging Voice VLAN

10. Refer to the exhibit. Communication between the VLANs is not occurring. What could be the issue?

    

    CCNA2 v6.0 Chapter 2 Exam 006

    •  The wrong port on the router has been used.
    •  The Gi1/1 switch port is not in trunking mode.
    •  A duplex issue exists between the switch and the router.
    •  Default gateways have not been configured for each VLAN.

    Explanation: The subinterfaces could not have an IP address unless the encapsulation mode had been configured. When a duplex issue exists, communication can still occur, but it is at a slower than optimum rate.

11. Refer to the exhibit. A network administrator is configuring inter-VLAN routing. However, the communication between VLAN 10 and VLAN 20 fails. Based on the output of the show vlan command, what is the cause of the problem?

    

    CCNA2 v6.0 Chapter 2 Exam 005

    •  Gi1/1 and Gi1/2 are not configured as trunk mode.
    •  Gi1/1 and Gi1/2 are not assigned to their respective VLANs.
    •  The IP addresses on Gi0/0 and Gi0/1 are switched by mistake.
    •  The IP addresses on Gi0/0 and Gi0/1 are not on the same network.

    Explanation: Because two physical interfaces on the router are connected to two physical ports on a switch, this is a legacy inter-VLAN configuration. With legacy inter-VLAN, the ports on the switch that are connected to the router need to be in access mode and assigned their respective VLANs. As shown in the display, these two ports are still in VLAN 1. The IP address on the router interface can be configured as needed, as long as the devices on the same VLAN are in the same network.

12. Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?

    

    CCNA2 v6.0 Chapter 2 Exam 004

    •  Gi0/0 is not configured as a trunk port.
    •  The command interface GigabitEthernet0/0.5 was entered incorrectly.
    •  There is no IP address configured on the interface Gi0/0.
    •  The no shutdown command is not entered on subinterfaces.
    •  The encapsulation dot1Q 5 command contains the wrong VLAN.

    Explanation: In router-on-a-stick, the subinterface configuration should match the VLAN number in the encapsulation command, in this case, the command encapsulation dot1Q 10 should be used for VLAN 10. Since subinterfaces are used, there is no need to configure IP on the physical interface Gi0/0. The trunk mode is configured on the switch port that connects to the router. The subinterfaces are turned on when they are added.

13. What happens to switch ports after the VLAN to which they are assigned is deleted?
    •  The ports are disabled.
    •  The ports are placed in trunk mode.
    •  The ports are assigned to VLAN1, the default VLAN.
    •  The ports stop communicating with the attached devices.

    Explanation: The affected ports must be reconfigured for an active VLAN.

14. Refer to the exhibit. After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem?

    

    CCNA2 v6.0 Chapter 2 Exam 002

    •  Dot1q does not support subinterfaces.
    •  There is no address on Fa0/0 to use as a default gateway.
    •  RTA is using the same subnet for VLAN 20 and VLAN 30.
    •  The no shutdown command should have been issued on Fa0/0.20 and Fa0/0.30.

    Explanation: The IP 192.168.2.49/27 and 192.168.3.62/27 belong to the same subnet of 192.168.3.32/27. Valid host IPv4 addresses include 192.168.3.33 to 192.168.3.62.

15. Refer to the exhibit. A router-on-a-stick configuration was implemented for VLANs 15, 30, and 45, according to the show running-config command output. PCs on VLAN 45 that are using the 172.16.45.0 /24 network are having trouble connecting to PCs on VLAN 30 in the 172.16.30.0 /24 network. Which error is most likely causing this problem?​

    

    CCNA2 v6.0 Chapter 2 Exam 003

    •  The wrong VLAN has been configured on GigabitEthernet 0/0.45.
    •  The command no shutdown is missing on GigabitEthernet 0/0.30.
    •  The GigabitEthernet 0/0 interface is missing an IP address.
    •  There is an incorrect IP address configured on GigabitEthernet 0/0.30.

    Explanation: he subinterface GigabitEthernet 0/0.30 has an IP address that does not correspond to the VLAN addressing scheme. The physical interface GigabitEthernet 0/0 does not need an IP address for the subinterfaces to function. Subinterfaces do not require the no shutdown command.

16. How are IP addressing designs affected by VLAN implementations?
    •  VLANs do not support VLSM.
    •  VLANs do not use a broadcast address.
    •  Each VLAN must have a different network number.
    •  Each VLAN must have a different subnet mask.

    Explanation: Each VLAN requires its own network number, broadcast address, and valid IP addresses because each VLAN is a separate network. IP addressing schemes are frequently designed with the VLAN numbers as part of the design.

17. Which three actions can cause problems with a VTP implementation? (Choose three.)
    •  using a non-trunk link to connect switches
    •  using non-Cisco switches
    •  configuring all switches to be in VTP server mode
    •  not using any VTP passwords on any switches
    •  using lowercase on one switch and uppercase on another switch for domain names
    •  having a VTP transparent switch in between a VTP server switch and a VTP client switch (all switches in the same VTP domain)

    Explanation: Besides domain name, other issues to check are VTP versions, VTP password, and revision number before inserting a switch into any network where VTP is active.

18. Refer to the exhibit. The switch does the routing for the hosts that connect to VLAN 5. If the PC accesses a web server from the Internet, at what point will a VLAN number be added to the frame?

    

    CCNA2 v6.0 Chapter 2 Exam 001

    •  point A
    •  point B
    •  point C
    •  point D
    •  point E
    •  No VLAN number is added to the frame in this design.

    Explanation: The switch has an SVI configured in VLAN 5 and is routing for VLAN 5. With this design no trunking is necessary. The switch port to which the PC attaches is in VLAN 5, so no trunking is needed there. The connection between the switch and the router is a routed port on the switch, so an IP address can be assigned and no trunking is needed. The connection from the router to the Internet is a serial WAN connection that requires no trunking.

19. How is traffic routed between multiple VLANs on a multilayer switch?
    •  Traffic is routed via physical interfaces.
    •  Traffic is routed via internal VLAN interfaces.
    •  Traffic is broadcast out all physical interfaces.
    •  Traffic is routed via subinterfaces.

    Explanation: Multilayer switches can perform inter-VLAN routing by the use of internal VLAN interfaces. External physical interfaces can receive traffic but are not necessary for routing functions. When routing between VLANs, any broadcast traffic that is received on a VLAN would remain on ports that are members of that VLAN. Subinterfaces are not usable for inter-VLAN routing on multilayer switches.

20. While configuring inter-VLAN routing on a multilayer switch, a network administrator issues the no switchport command on an interface that is connected to another switch. What is the purpose of this command?
    •  to create a routed port for a single network
    •  to provide a static trunk link
    •  to create a switched virtual interface
    •  to provide an access link that tags VLAN traffic

    Explanation: When a Layer 2 interface on a multilayer switch is configured with the no switchport command, it becomes a routed port. A routed port is configured with an IP address for a specific subnet.

21. What is a disadvantage of using multilayer switches for inter-VLAN routing?
    •  Multilayer switches have higher latency for Layer 3 routing.
    •  Multilayer switches are more expensive than router-on-a-stick implementations.
    •  Spanning tree must be disabled in order to implement routing on a multilayer switch.
    •  Multilayer switches are limited to using trunk links for Layer 3 routing.

    Explanation: The main disadvantage of the multilayer switches is their higher cost. Because both routing and switching are done in hardware, multilayer switches are faster than router-on-a-stick.

22. What is a characteristic of a routed port on a Layer 3 switch?
    •  It supports trunking.
    •  It is not assigned to a VLAN.
    •  It is commonly used as a WAN link.
    •  It cannot have an IP address assigned to it.

    Explanation: A routed port on a Layer 3 switch is commonly used for connecting between distribution and core layer switches or between a Layer 3 switch and a router. This port does not get VLAN or trunking commands assigned to it. Instead, the port is programmed with an IP address. This is commonly used when static routing is configured on the switch or when a routing protocol is being run between the Layer 3 switch and the router or another Layer 3 switch.

23. Fill in the blank.
    In a Cisco switch, the extended range VLAN information is stored in the                running configuration                  file.

    Explanation: Extended range VLANs, 1006 through 4094, are not written to the vlan.dat file but are saved in the running configuration file.

24. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
    Fill in the blank. Do not use abbreviations.
    Which command is missing on the Layer 3 switch to restore the full connectivity between PC1 and the web server? (Note that typing no shutdown will not fix this problem.)    ip address 192.168.20.1 255.255.255.0

    Explanation: In the show interfaces trunk output, the G0/2 interface of DLS1 is not listed. This indicates the interface has probably not been configured as a trunk link.

25. Match the DTP mode with its function. (Not all options are used.)

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  CCNA3 v6.0 Chapter 2 Exam 01