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CCNA – VTP Questions

February 17th, 2011 Go to comments

Here you will find answers to VTP Questions

If you are not sure about VTP, please read my VTP tutorial

Question 1

Refer to the exhibit. After SwitchB was added to the network, VLAN connectivity problems started to occur. What caused this problem?

show_vtp_status.jpg

A. Both switches are in server mode in the same domain.
B. The revision number of SwitchB was higher than the revision number of SwitchA.
C. SwitchA was not rebooted prior to adding SwitchB to the network.
D. V2-mode is not enabled.
E. VTP pruning is not activated, so the new paths in the network have not been recalculated.

 

Answer: B

Explanation

SwitchB has the same VTP Domain Name with SwitchA and it has a higher Configuration Revision number (7 > 1) so it will overwrite VLAN information of SwitchA. Because SwitchB is a new switch so its VLAN information is different from SwitchA -> VLAN connectivity problem occurs.

Question 2

A network administrator is explaining VTP configuration to a new technician. What should the network administrator tell the new technician about VTP configuration? (Choose three)

A. A switch in the VTP client mode cannot update its local VLAN database.
B. A trunk link must be configured between the switches to forward VTP updates.
C. A switch in the VTP server mode can update a switch in the VTP transparent mode.
D. A switch in the VTP transparent mode will forward updates that it receives to other switches.
E. A switch in the VTP server mode only updates switches in the VTP client mode that have a higher VTP revision number.
F. A switch in the VTP server mode will update switches in the VTP client mode regardless of the configured VTP domain membership.

 

Answer: A B D

Question 3

What are two benefits of using VTP in a switching environment? (Choose two)

A.It allows switches to read frame tags.
B. It allows ports to be assigned to VLANs automatically.
C. It maintains VLAN consistency across a switched network.
D. It allows frames from multiple VLANs to use a single interface.
E. It allows VLAN information to be automatically propagated throughout the switching environment.

 

Answer: C E

Question 4

What is the name of the VTP mode of operation that enables a switch to forward only VTP advertisements while still permitting the editing of local VLAN information?

A. server
B. client
C. tunnel
D.transparent

 

Answer: D

Question 5

Which VTP mode is capable of creating only local VLANs and does not synchronize with other switches in the VTP domain?

A. client
B. dynamic
C. server
D. static
E. transparent

 

Answer: E

Question 6

An administrator is unsuccessful in adding VLAN 50 to a switch. While troubleshooting the problem, the administrator views the output of the show vtp status command, which is displayed in the graphic. What commands must be issued on this switch to add VLAN 50 to the database? (Choose two)

show_vtp_status_add_VLAN.jpg

A. Switch(config-if)# switchport access vlan 50
B. Switch(config)#vtp mode server
C. Switch(config)# config-revision 20
D. Switch(config)#vlan 50 name Tech
E. Switch(vlan)# vlan 50
F. Switch(vlan)# switchport trunk vlan 50

 

Answer: B E

Explanation

First we notice that the “VTP Operating Mode” of this switch is “Client”. In this mode we can’t add new VLAN so we must change to “Server” mode -> B is correct.

Now we can add a new VLAN, E is the correct configuration for adding a new VLAN.

Question 7

To configure the VLAN trunking protocol to communicate VLAN information between two switches, what two requirements must be met? (Choose two)

A. Each end of the trunk line must be set to IEEE 802.1E encapsulation.
B. The VTP management domain name of both switches must be set the same.
C. All ports on both the switches must be set as access ports.
D. One of the two switches must be configured as a VTP server.
E. A rollover cable is required to connect the two switches together.
F. A router must be used to forward VTP traffic between VLANs.

 

Answer: B D

Explanation

In Cisco switches there are two encapsulations: 802.1q and ISL so we can set two ends to ISL instead -> A is not correct.

The ports between two switches must be set to trunk ports so that they can exchange VLAN information through VTP -> C is not correct.

To connect two switches we can use cross-over cable or straight-through cable (because modern Cisco switches can “auto-sense”) but not rollover cable -> E is not correct.

To forward traffic in the same VLAN (between two or more switches) we can use switches only. If we want to forward VTP traffic between different VLANs we can use either a router or a Layer 3 switch -> F is not correct.

Two switches can only communicate when they are set to the same VTP domain name (and the same VTP password) -> B is correct.

One of the two switches must be set to VTP Server so that it can create VTP updates and advertise its VLAN information.

Question 8

Which statements describe two of the benefits of VLAN Trunking Protocol? (Choose two)

A. VTP allows routing between VLANs.
B. VTP allows a single switch port to carry information to more than one VLAN.
C. VTP allows physically redundant links while preventing switching loops.
D. VTP simplifies switch administration by allowing switches to automatically share VLAN configuration information.
E. VTP helps to limit configuration errors by keeping VLAN naming consistent across the VTP domain.
F. VTP enhances security by preventing unauthorized hosts from connecting to the VTP domain.

 

Answer: D E

Explanation

The main purposes of VTP are to simplify switch administration and limit VLAN configuration errors by allowing switches to automatically share VLAN configuration information. It doesn’t require the administrator to go to every switch to configure VLANs.

Maybe you will feel F is also a correct answer but it is not true because VTP only enhances security by preventing unauthorized switches (not hosts) from connecting to the VTP domain (by configuring a VTP domain name & VTP password). An unauthorized host can easily use the network cable of an authorized host to access the network.

Question 9

What are two results of entering the Switch(config)#vtp mode client command on a Catalyst switch? (Choose two)

A. The switch will ignore VTP summary advertisements.
B. The switch will forward VTP summary advertisements.
C. The switch will process VTP summary advertisements.
D. The switch will originate VTP summary advertisements.
E. The switch will create, modify and delete VLANs for the entire VTP domain.

 

Answer: B C

Question 10

Refer to the exhibit. The show vtp status command is executed at a switch that is generating the exhibited output. Which statement is true for this switch?

show_vtp_status_2.jpg

A. The switch forwards its VLAN database to other switches in the ICND VTP domain.
B. The configuration revision number increments each time the VLAN database is updated,
C. The switch forwards VTP updates that are sent by other switches in the ICND domain,
D. The VLAN database is updated when VTP information is received from other switches.

 

Answer: C

Explanation

In Transparent mode switch just forwards update sent by other switches without reading it. It doesn’t update its VLAN database so the Configuration Revision doesn’t increase.

Question 11

Refer to the exhibit, The VLAN configuration of S1 is not being in this VTP enabled environment. The VTP and uplink port configurations for each switch are displayed. Which two command sets, if issued, resolve this failure and allow VTP to operate as expected? (choose two)

VTP_mode_client.jpg

A. S2(config)#vtp mode transparent
B. S1(config)#vtp mode client
C. S2(config)#interface f0/24
S2(config-if)#switchport mode access
S2(config-if)#end
D. S2(config)#vtp mode client
E. S1(config)#interface f0/24
S1(config-if)#switchport mode trunk
S1(config-if)#end

 

Answer: B E

Explanation

First from the output of S1, we learn that it is running under “vtp transparent mode”. In this mode, S1 still receives VTP updates but not learns them. Also in this mode, no trunking is created -> It should be in client or server mode but S2 is already in server mode -> S1 should be in client mode -> B is correct.

Also, VTP updates are only sent on trunk links so the link between S1 and S2 must be set as trunk -> port f0/24 on S1 should be configured as trunked port -> E is correct.

Comments (297) Comments
Comment pages
  1. Vanessa
    November 28th, 2011

    Q6: Is there such command as “Switch(vlan)#vtp server” ?
    The command I know is “Switch(config)#vtp mode server” and as you can see it is in the global configuration mode. Also in option A, you can create vlan 50 with the
    “Switch(config-if)#switchport acccess vlan 50″ command. The vlan will be automatically created if it does not exist.

  2. byPass
    December 1st, 2011

    @ Vanessa

    I agree with Vanessa for Q6

    Option E is:
    E. Switch(vlan)# vlan 50.

    You should be in (config) mode, not (vlan) when you are entering command: vlan 50

    so, I also think that option A and B are right answer…

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    December 7th, 2011

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  4. Diego
    December 9th, 2011

    Q6 doesn’t have valid answers to choose, because de mode is (config)# vtp mode server and the VLAN is

    (config)# vlan 50
    (config-vlan)# name (****)

    A. Switch(config-if)# switchport access vlan 50> isn’t required, to accomplish the requirements, it is optional.

    B. Switch(vlan)#vtp server> incorrect statement (vlan mode not exists, only user mode,
    privileged mode and global config mode)

    C. Switch(config)# config-revision 20> isn’t necessary

    D. Switch(config)#vlan 50 name Tech > incorrect combination

    E. Switch(vlan)# vlan 50> incorrect statement (vlan mode not exists, only user mode,
    privileged mode and global config mode)

    F. Switch(vlan)# switchport trunk vlan 50> very wrong statement

  5. Diego
    December 9th, 2011

    The option A is the only one that can reach the goal, but it will could never be configure because the switch is in mode client

  6. Diego
    December 9th, 2011

    interface FastEthernet0/1
    switchport access vlan 50
    switchport mode access

    —- ——————————– ——— ——————————-
    1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5
    Fa0/6, Fa0/7, Fa0/8, Fa0/9
    Fa0/10, Fa0/11, Fa0/12, Fa0/13
    Fa0/14, Fa0/15, Fa0/16, Fa0/17
    Fa0/18, Fa0/19, Fa0/20, Fa0/21
    Fa0/22, Fa0/23, Fa0/24
    1002 fddi-default act/unsup
    1003 token-ring-default act/unsup
    1004 fddinet-default act/unsup
    1005 trnet-default act/unsup

    By the mode client the vlan does not appear into the vlan data base, so A is an improper way to create the vlan 50 in this case.

  7. pmol
    December 9th, 2011

    you should consider function of “vlan database” statment which is also an option for vlan configuration

  8. Srikanthsharma
    December 10th, 2011

    hi friends,this blog is very helpful for me,it really increasing my confidence towards certification,pls send questions and any imp material and valuable advices to my email srikanth_sharma25@yahoo.com.thanks in advance friends.

  9. Tony M
    December 13th, 2011

    can not get this sim to work … 9tut.com_CCNA_vtp_sim.pka does anyone know why…?

  10. Samir
    January 4th, 2012

    At first site I thought correct answers would be B and D. However, simulating it on Packet Tracer, I’m convinced otherwise.

    Diego,
    “vlan mode” exists (#vlan database)

    Switch#vlan database
    % Warning: It is recommended to configure VLAN from config mode,
    as VLAN database mode is being deprecated. Please consult user
    documentation for configuring VTP/VLAN in config mode.

    Switch(vlan)#vtp server
    Setting device to VTP SERVER mode.
    Switch(vlan)#vlan 50
    VLAN 50 added:
    Name: VLAN0050

    So, B and E are correct, indeed.

  11. hopone
    January 6th, 2012

    transparent mode can use extended vlan . Be aware of this

  12. pav312
    January 7th, 2012

    10Mbps line can be used for trunk connection?

  13. tohritz
    January 16th, 2012

    what happens to a vtp client when it receives an advertisement from a server with the same domain and password, but with different version? let’s say the client’s version is 1 but the server’s is 2. is this scenario possible?

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    January 16th, 2012

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  15. Anju
    January 17th, 2012

    @tohritz,
    A vtp client process the VTP advertisement sent from server only if the revision number of server is greater than that of client.

  16. @anju
    January 19th, 2012

    so the client will still update his database with that of the server, given the latter’s revision is higher, even if client has “version 1″ and server has “version 2″ or vice versa. is that so? in this case, the version number is not important with the vtp process, only the revision number?

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    February 2nd, 2012

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    February 5th, 2012

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    February 20th, 2012

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    February 24th, 2012

    Did they change the time format? I took the exam today and failed as it only gave me 75 minutes for 43 questions on the ITCND2. I ran out of time ofcourse. I thought it was 90 minutes and 40 questions.

  25. smprr2
    February 28th, 2012

    Hello guys, Q2:

    It says te answer A is correct, But according to theory “VTP client can update it’s VLAN database, only if it has a higher configuration revision
    number” Therefore Answer A doesn’t seem correct to me, please correct me if I’m wrong

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    February 28th, 2012

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  27. DimS
    March 1st, 2012

    @smprr2:
    A. A switch in the VTP client mode cannot update its local VLAN database. – It’s true.
    Only switches in VTP transparent mode are able to manage local VLAN database. In VTP client mode switch has a copy of “common” VTP database.

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    March 2nd, 2012

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    March 4th, 2012

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    March 7th, 2012

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  31. Robin
    March 9th, 2012

    Very useful Questions …

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  35. Mike Hackerts
    March 12th, 2012

    Hi

    for Q1: wouldnt it also be true that having 2 server mode switches
    in same domain, 1st and foremost, is the issue? Or is that setup an approved cisco
    networking practice? Why is “higher vtp revision” # the only focus/valid answer?

    is it because 2 server mode switches in same vtp domain at same time with same rev # would not cause a problem? so we default to the revision # as the problem? and also because client mode switch in same vtp domain with higher rev # can overwrite vlans on server mode switch?
    is that all true?

    Thank you in advance for your help

  36. Kenny Tan
    March 28th, 2012

    Dear All, regarding the CCNA exam, what the means of labs question ? nit all also objective question?

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    March 31st, 2012

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  38. bunty
    April 1st, 2012

    @Mike
    for Q1: option B is correct. here is some explaination from todd lammle’s book

    You may be tempted to say it’s because they’re both VTP servers, but that is not the problem.
    All your switches can be servers and they can still share VLAN information. As a matter
    of fact, Cisco actually suggests that all switches stay VTP servers and that you just make sure
    the switch you want to advertise VTP VLAN information has the highest revision number. If
    all switches are VTP servers, then all of the switches will save the VLAN database. But SwitchB
    isn’t receiving VLAN information from SwitchA because SwitchB has a higher revision number
    than SwitchA. It’s very important that you can recognize this problem.

  39. Anonymous
    April 5th, 2012

    Test Monday…… if any one could send me the latest dumps I would be ever so grateful. Thank you big time.
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  40. alaa
    April 10th, 2012

    Q8\ Which statements describe two of the benefits of VLAN Trunking Protocol?

    please can any one explain to me why answer B is not correct

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    April 21st, 2012

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  43. qrsa
    April 28th, 2012

    >Q8\ Which statements describe two of the benefits of VLAN Trunking Protocol?
    >please can any one explain to me why answer B is not correct
    В: VTP allows a single switch port to carry information to more than one VLAN

    Because Trunking (not VTP) allows to carry information to more than one VLAN.

    By the way… it’s worth to know, that in CCNP Switching VTP и only used in an end-to-end VLAN scenarios! The best practice is not to span VLAN over switches (SwitchA – VL 100,101, SwitchB – VL 102,103 and so on); and not to use L2 links between Distribution level switches!

    If you use VTP (server/client), then:
    – after adding VLAN, you have to check if is was successfully created on every switch (this is a point in switching questions);
    – it’s possible to break your vlan database if switch with a higher revision number joins network;
    – pruning has some flaws (doesn’t work as expected) and often it’s nice to turn it off and use swi tru al vl;
    – vTP v1/2 doesn’t support private-vlan;
    – if you copy startup-config from one switch to another, only in vtp transparent mode vlans will be transmitted properly.

    So, in the real world you will primarily use transparent VTP v2.

  44. edz cudz
    April 28th, 2012

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  45. lucas
    May 2nd, 2012

    do i have to do configurations during ccna exam

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    May 6th, 2012

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    May 7th, 2012

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    May 14th, 2012

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    May 14th, 2012

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