Cisco CH4 Practice Test

7/28/2019 Cisco CH4 Practice Test

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Exploration Chapter 4. Study questions. Answers

4.1

What is the purpose of VTP?

To make the management of VLANs easier by allowing switches to learn

about VLANs from each other.

What sort of link between switches is needed to transmit VTP

advertisements?

A trunk link.

What are the three VTP modes that a switch could take?

Server, client and transparent.

What name is given to a group of switches that share VLAN information

using VTP?

A VTP domain.

Which VTP modes allow switches to save VLAN information in the vlan

database?

Server mode switches store VLAN information for their domain.

Transparent mode switches store information about their own VLANs.

Which VTP versions can be used on a Catalyst 2960 switch, and which is

the default version?

Versions 1 and 2 can be used. Version 1 is the default. There is a

version 3 that can be used on some switches, but no on the Catalyst

2960.

How is a VTP domain identified?

By its domain name.

Which command is commonly used to display information about VTP?

Show vtp status

How is a VTP message encapsulated?

It is encapsulated inside an Ethernet frame that is tagged using

802.1Q or ISL.

What destination MAC address is used for VTP messages?


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The multicast address 01-00-0C-CC-CC-CC

What does a server switch do to the configuration revision number when

a new VLAN is added?

Increases it by 1.

What is the purpose of including the configuration revision number in

a VTP advertisement?

It shows the receiving switch whether the advertisement contains more

up to date information than the information that it already has.

Which type of VTP advertisement contains information about VLANs?

The subset advertisement.

How often does a switch send out summary advertisements?

Every 5 minutes, or when the VLAN configuration is changed.

A client switch is reset. How does it obtain VLAN information?

It does not have any vlan database of its own, so it needs to obtain

VLAN information from a server switch in its domain. It sends out a

VTP request advertisement and receives information in a subset

advertisement from the server.

A client switch receives a summary advertisement with a lowerconfiguration revision number than its own. What does it do?

It will forward the summary advertisement to any other switches, but

do nothing else about it. There is no newer VLAN information

available.

A client switch receives a summary advertisement with a higher

configuration revision number than its own. What does it do?

It sends out a VTP request advertisement and receives information in a

subset advertisement from the server.

A transparent switch receives a summary advertisement. What does it

do?

It will forward the summary advertisement to other switches but ignore

its contents.

Which modes of switch will allow you to create new VLANs?


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Server switches (for the domain) and Transparent switches (for local

use only).

Is it possible to have more than one server switch on a domain?

Yes. It is a good idea to have more than one server. If there was only

one server and it failed, then the VLAN information would be lost.

Is a transparent switch able to obtain VLAN information when it

reboots?

If the switch has any VLANs configured then they will be saved in the

switchs own VLAN database, and they will be retrieved. The switch

stays in transparent mode (assuming that the configuration has been

saved.)

Does any VLAN configuration have to be carried out on a client switch?

Switchports need to be assigned to VLANs. This is not done centrally,

but is done on each switch.

What is the effect of giving the vtp pruning command on a server

switch?

VTP pruning is enabled for the whole domain. VLAN flood traffic will

be sent only where it is needed in the direction of devices on that

VLAN.

What happens to the vtp configuration revision number of a switch if

you change its vtp domain name?

It is reset to the default value of 0.

Why might you want to change the domain name of a switch temporarily

before adding it to an existing VTP domain?

If the new switch has a configuration revision number of 0 then there

is no danger of the new switch altering the VLAN information in the

VTP domain and updating it with the wrong information.

Which should you do first on a server, configure the VTP domain nameor create the VLANs?

Configure the domain name first because this will remove existing

VLANs.

Which command will make a switch into a VTP client?

vtp mode client


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If VTP is not working correctly, what should you check?

VTP Version. It needs to be the same on all switches in the domain.

Domain name. Is it exactly the same on all switches?

VTP Password if any. Is it exactly the same on all switches?

Check that there is at least one server. Better to have at least two.If you recently added a new switch, had its revision number been set

to 0?

Is it possible to have a VTP domain where all the switches are in

server mode?

Yes.

CCNA3 Chapter 4 Practice Test Answers

What is the default Catalyst switch configuration?

* VTP version 1, Mode server, Domain name cisco1, revision number 1.* VTP version 1, Mode server, no Domain name, revision number 0.

* VTP version 2, Mode server, no Domain name, revision number 0.* VTP version 1, Mode client, Domain name cisco1, revision number 0.

Which switches can only use VTP version 1, and not version 2?

* Catalyst 2960 switches* All Catalyst switches* Older Cisco switches

* Non-Cisco switches

If you have a domain of switches that are all capable of using version 2, and you wantthem to use version 2, which switches must you configure for version 2?

* All switches* All server switches

* Any server switch* Any switch

You have a group of switches that have never been configured for VTP, and you wantthem to act as a VTP domain. What is the best way of ensuring that they all have thesame domain name?

* Configure the name on one switch that is in server mode and allow


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Which is true of VTP?

* It operates at OSI layer 1* It operates only on Cisco switches

* A VTP domain can extend beyond a layer 3 switch*

VTP is enabled by default on Catalyst switches

Which of these is not the name of a VTP advertisement?

* Summary advertisement* Request advertisement* Detail advertisement

* Subset advertisement

How is a VTP advertisement encapsulated?

* In the data field of an IP packet* In the data field of an Ethernet frame

* In a set of extra fields added to the frame header* As part of the tag of a tagged Ethernet frame

What does a VTP server switch do if it receives a VTP subset advertisement with ahigher revision number than its existing revision number?

* It ignores the advertisement because only client switches update theirVLAN information from advertisements.

* It increases the revision number by 1 and passes the advertisement on to

other switches in the domain.* It updates its own VLAN configuration by using the information inthe advertisement.

* It updates its own revision number but does not use the informationcontained in the advertisement.

What can you not do on a VTP client switch?

* Configure the VTP domain name* Delete a VLAN

* Assign a switchport to a VLAN* Set a password

In the diagram, switches S1, S2, S3, S5 and S6 all have switchports on VLANs 10, 20and 30. Switch S4 does not use any of these VLANs. Switch S4 has switchports onVLANs 40 and 50, which are not used elsewhere. How should S4 be configured?


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* S4 should be put in transparent mode.* S4 should be a server, and have a different domain name from the other

switches.* S4 should have its revision number reset to zero.*

S4 should have a different password from the other switches.

How many server switches should you have in a VTP domain?

* Only one.* It is a good idea to have two, so that there is a back up for the data, but

there cannot be more than two.* Up to half the switches can be servers.* At least two, but it is possible for them all to be servers.

What happens when a client switch is reloaded?

* It loses all its VLAN data and has to be reconfigured.* It loses all its VLAN data and has to learn them again from a server.

* It can retrieve its VLANs from NVRAM providing that the configuration hasbeen saved.

* It returns to the default server mode.

Where can VTP advertisements be sent?

* On any links connecting switches.* Only on trunk links.*

Only on links using 802.1Q frame tagging* Only on links using ISL frame tagging


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The switches have ports assigned to the VLANs shown. What is the best way ofrestricting VLAN 4 broadcast transmissions in order to cut down unnecessary traffic?

* Enable VTP pruning on the switches.

*

Add a router between S1 and S4.* Have two separate VTP domains, one for S1, S2 and S3 and the other forS4, S5 and S6.

* Make S1 into a transparent mode switch.

What triggers a VTP server switch to send a summary advertisement? Choose all thatapply.

* A 5 minute timer expires.* A new VLAN has just been configured on the switch.

* An existing VLAN has just had its name changed.

* A Switchport had just been moved from one VLAN to another.

The switches are not exchanging VLAN information correctly. What is the likelyproblem?

* One of the switches is in the wrong mode.* One of the switches does not have switchports in VLANs 2 or 3.


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* The switches do not all have the same config revision number.* The switches are not all in the same VTP domain

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