Which three statements are typical characteristics of VLAN arrangements? - A new switch has no VLANs configured - Connectivity between VLANs requires a Layer 3 device - VLANs typically decrease the number of collision domains - Each VLAN uses a separate address space - A switch maintains a separate bridging table for each VLAN - VLANs cannot span multiple switches

- Connectivity between VLANs requires a Layer 3 device - Each VLAN uses a separate address space - A switch maintains a separate bridging table for each VLAN

VLANs Flashcards by Frederick Karban

Which statement about switch access ports is true?

They drop packets with 802.1q tags
A VLAN must be assigned to an access port before it is created
They can receive traffic from more than one VLAN with no voice support
By default, they carry traffic for VLAN 10

The drop packets with 802.1q tags

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Which three statements are typical characteristics of VLAN arrangements?

A new switch has no VLANs configured
Connectivity between VLANs requires a Layer 3 device
VLANs typically decrease the number of collision domains
Each VLAN uses a separate address space
A switch maintains a separate bridging table for each VLAN
VLANs cannot span multiple switches

Connectivity between VLANs requires a Layer 3 device
Each VLAN uses a separate address space
A switch maintains a separate bridging table for each VLAN

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Which two are advantages of static routing when compared to dynamic routing? (Choose two)

Security increases because only the network administrator may change the routing tables
Configuration complexity decreases as network size increases
Routing updates are automatically sent to neighbors
Route summarization is computed automatically by the router
Routing traffic load is reduced when used in stub network links
An efficient algorithm is used to build routing tables using automatic updates
Routing tables adapt automatically to topology changes

Security increases because only the network administrator may change the routing tables

Routing traffic load is reduced when used in stub network links

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Which statement about slow interVLAN forwarding is true?

The VLAN is experiencing slowness in the point-to-point collisionless connection
The VLANs are experiencing slowness because multiple devices are connected to the same hub
The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected
The entire VLAN is experiencing slowness
The VLANs are experiencing slowness due to a duplex mismatch

The VLANs are experiencing slowness due to a duplex mismatch

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How can you disable DTP on a switch port?

Configure the switch port as a trunk
Add an interface on the switch to a channel group
Change the operational mode to static access
Change the administrative mode to access

Configure the switch port as a trunk

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Which protocol supports sharing the VLAN configuration between two or more switches?

multicast

STP

VTP

split-horizon

VTP

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Which two circumstances can cause collision domain issues on a VLAN domain? (Choose two)

duplex mismatches on Ethernet segments in the same VLAN
multiple errors on switch port interfaces
congestion on the switch inband path
a failing NIC in an end device
an overload shared segment

duplex mismatches on Ethernet segments in the same VLAN

congestion on the switch inband path

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Which statement about DTP is true?

It uses the native VLAN
It negotiates a trunk link after VTP has been configured
It uses desirable mode by default
It sends data on VLAN 1

It sends data on VLAN 1

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show ip interface brief
show ip nat statistics
show ip statistics
show ip route

show ip interface brief

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Refer to the exhibit. A technician has configured the FastEthernet 0/1 interface on Sw11 as an access link in VLAN 1. Based on the output from the show vlan brief command issued on Sw12, what will be the result of making this change on Sw11?

A. Only the hosts in VLAN 1 on the two switches will be able to communicate with each other.
B. The hosts in all VLANs on the two switches will be able to communicate with each other.
C. Only the hosts in VLAN 10 and VLAN 15 on the two switches will be able to communicate with each other.
D. Hosts will not be able to communicate between the two switches.

D. Hosts will not be able to communicate between the two switches.

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Refer to the exhibit. C-router is to be used as a “router-on-a-stick” to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?

A. These commands need to be added to the configuration:
C-router(config)# router eigrp 123
C-router(config-router)# network 172.19.0.0
B. These commands need to be added to the configuration:
C-router(config)# router ospf 1
C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0
C. These commands need to be added to the configuration:
C-router(config)# router rip
C-router(config-router)# network 172.19.0.0
D. No further routing configuration is required

D. No further routing configuration is required

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Refer to the exhibit. What information about the interfaces on the Main_Campus router is true?

A. The LAN interfaces are configured on different subnets.
B. Interface FastEthernet 0/0 is configured as a trunk.
C. The Layer 2 protocol of interface Serial 0/1 is NOT operational.
D. The router is a modular router with five FastEthernet interfaces.
E. Interface FastEthernet 0/0 is administratively deactivated.

B. Interface FastEthernet 0/0 is configured as a trunk.

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Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the reasons that interface FastEthernet 0/10 is not the root port for VLAN 2?

A. This switch has more than one interface connected to the root network segment in VLAN 2.
B. This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.
C. This switch interface has a higher path cost to the root bridge than another in the topology.
D. This switch has a lower bridge ID for VLAN 2 than the elected designated switch.

C. This switch interface has a higher path cost to the root bridge than another in the topology.

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Refer to the exhibit. A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN 2. What causes this behavior?

A. trunk mode mismatches
B. allowing only VLAN 2 on the destination
C. native VLAN mismatches
D. VLANs that do not correspond to a unique IP subnet

C. native VLAN mismatches

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What are two characteristics of a switch that is configured as a VTP client? (Choose two.)

A. If a switch that is configured to operate in client mode cannot access a VTP server, then the switch reverts to transparent mode.
B. On switches that are configured to operate in client mode, VLANs can be created, deleted, or renamed locally.
C. The local VLAN configuration is updated only when an update that has a higher configuration revision number is received.
D. VTP advertisements are not forwarded to neighboring switches that are configured in VTP transparent mode.
E. VTP client is the default VTP mode.
F. When switches in VTP client mode are rebooted, they send a VTP advertisement request to the
VTP servers.

C. The local VLAN configuration is updated only when an update that has a higher configuration revision number is received.

F. When switches in VTP client mode are rebooted, they send a VTP advertisement request to the VTP servers.

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The ROUTE company has a small network. The network consists of one switch and one router. The switch has been configured with two VLANs. The router has been configured as a router-ona-stick to allow inter-VLAN routing. A trunk is configured to connect the switch to the router. What is the minimum number of router subinterfaces that are required for all the VLANs to communicate?

A. zero
B. one
C. two
D. three

C. two

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Assuming the default switch configuration, which VLAN range can be added, modified, and removed on a Cisco switch?

A. 1 through 1001
B. 2 through 1001
C. 1 through 1002
D. 2 through 1005

B. 2 through 1001

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Which protocol provides a method of sharing VLAN configuration information between switches?

A. VTP
B. STP
C. ISL
D. 802.1Q
E. VLSM

A. VTP

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What are three valid reasons to assign ports to VLANs on a switch? (Choose three.)

A. to make VTP easier to implement
B. to isolate broadcast traffic
C. to increase the size of the collision domain
D. to allow more devices to connect to the network
E. to logically group hosts according to function
F. to increase network security

B. to isolate broadcast traffic

E. to logically group hosts according to function

F. to increase network security

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Two switches are connected through a trunk link. Which two commands show that there is a native VLAN mismatch on that link? (Choose two.)

A. show vlan brief
B. show interface trunk
C. show interface vlan
D. show interface switchport
E. show interface interface
F. show switchport trunk

B. show interface trunk

D. show interface switchport

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Which three statements about VTP features are true? (Choose three.)

A. VTP works at Layer 3 of the OSI model and requires that a management VLAN IP address be configured.
B. When properly configured, VTP minimizes VLAN misconfigurations and configuration inconsistencies.
C. When properly configured, VTP maintains VLAN configuration consistency and accelerates trunk link negotiation.
D. Each broadcast domain on a switch can have its own unique VTP domain.
E. VTP pruning is used to increase available bandwidth in trunk links.
F. To configure a switch to be part of two VTP domains, each domain must have its own passwords.
G. Client, server, and transparent are valid VTP modes.

B. When properly configured, VTP minimizes VLAN misconfigurations and configuration inconsistencies.

E. VTP pruning is used to increase available bandwidth in trunk links.

G. Client, server, and transparent are valid VTP modes.

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Which three elements must be used when you configure a router interface for VLAN trunking? (Choose three.)

A. one physical interface for each subinterface
B. one IP network or subnetwork for each subinterface
C. a management domain for each subinterface
D. subinterface encapsulation identifiers that match VLAN tags
E. one subinterface per VLAN
F. subinterface numbering that matches VLAN tags

B. one IP network or subnetwork for each subinterface

D. subinterface encapsulation identifiers that match VLAN tags

E. one subinterface per VLAN

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Refer to the exhibit. Which two statements about the configuration of the switch interface are correct? (Choose two.)

A. The switchport belongs only to VLAN 2.
B. By default, all switch ports are members of VLAN 1005.
C. Interface fa0/0 will be in both VLAN 1 (by default) and VLAN 2.
D. The exhibit shows interface fa0/0 to be dynamically mapped to VLAN 2.
E. A network host can be connected to this interface.

A. The switchport belongs only to VLAN 2.

E. A network host can be connected to this interface.

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Refer to the exhibit. How should Switch1 and Switch2 be connected in order to allow full communication between all of the hosts?

A. Exhibit A
B. Exhibit B
C. Exhibit C
D. Exhibit D
E. Exhibit E
F. Exhibit F

F. Exhibit F

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VLAN 3 is not yet configured on your switch. What happens if you set the switchport access vlan 3 command in interface configuration mode? A. The command is rejected. B. The port turns amber. C. The command is accepted and the respective VLAN is added to vlan.dat. D. The command is accepted and you must configure the VLAN manually.

C. The command is accepted and the respective VLAN is added to vlan.dat.

Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over Fast Ethernet? A. 802.3ad B. 802.1w C. 802.1D D. 802.1Q

D. 802.1Q

What are three benefits of implementing VLANs? (Choose three.) A. A higher level of network security can be reached by separating sensitive data traffic from other network traffic. B. A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure. C. A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure. D. Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size. E. Broadcast storms can be mitigated by decreasing the number of broadcast domains, thus increasing their size. F. VLANs make it easier for IT staff to configure new logical groups, because the VLANs all belong to the same broadcast domain. G. Port-based VLANs increase switch-port use efficiency, thanks to 802.1Q trunks.

A. A higher level of network security can be reached by separating sensitive data traffic from other network traffic. C. A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure. D. Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.

A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffic. What is the effect of adding switch ports to a new VLAN on the switch? A. More collision domains will be created. B. IP address utilization will be more efficient. C. More bandwidth will be required than was needed previously. D. An additional broadcast domain will be created.

D. An additional broadcast domain will be created.

Which protocol provides a method of sharing VLAN configuration information between switches? A. VTP B. STP C. ISL D. 802.1Q E. VLSM

A. VTP

Refer to the exhibit. The network shown in the exhibit has just been installed. Host B can access the Internet, but it is unable to ping host C. What is the problem with this configuration? A. Host B should be in VLAN 13. B. The address of host C is incorrect. C. The gateway for host B is in a different subnet than the host is on. D. The switch port that sends VLAN 13 frames from the switch to the router is shut down. E. The switch port connected to the router is incorrectly configured as an access port.

B. The address of host C is incorrect.

Refer to the exhibit. How should the FastEthernet0/1 ports on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices? A. The ports only need to be connected by a crossover cable. B. SwitchX(config)# interface fastethernet 0/1 SwitchX(config-if)# switchport mode trunk C. SwitchX(config)# interface fastethernet 0/1 SwitchX(config-if)# switchport mode access SwitchX(config-if)# switchport access vlan 1 D. SwitchX(config)# interface fastethernet 0/1 SwitchX(config-if)# switchport mode trunk SwitchX(config-if)# switchport trunk vlan 1 SwitchX(config-if)# switchport trunk vlan 10 SwitchX(config-if)# switchport trunk vlan 20

B. SwitchX(config)# interface fastethernet 0/1 SwitchX(config-if)# switchport mode trunk

Refer to the exhibit. What can be determined about the interfaces of the Main\_Campus router from the output shown? A. The LAN interfaces are configured on different subnets. B. Interface FastEthernet 0/0 is configured as a trunk. C. The Layer 2 protocol of interface Serial 0/1 is NOT operational. D. The router is a modular router with five FastEthernet interfaces. E. Interface FastEthernet 0/0 is administratively deactivated.

B. Interface FastEthernet 0/0 is configured as a trunk.

A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. How can you accomplish this task, using the fewest physical interfaces and without decreasing network performance? A. Use a hub to connect the four VLANS with a Fast Ethernet interface on the router. B. B. Add a second router to handle the VLAN traffic. C. Add two more Fast Ethernet interfaces. D. Implement a router-on-a-stick configuration.

D. Implement a router-on-a-stick configuration.

A department decides to replace its hub with a Catalyst 2950 switch that is no longer needed by another department. To prepare the switch for installation, the network administrator has erased the startup configuration and reloaded the switch. However, PCs that are connected to the switch experience various connectivity problems. What is a possible cause of the problem? A. The VLAN database was not erased. B. The management VLAN is disabled. C. The running configuration should have been erased. D. The “mode” button was not pressed when the switch was reloaded. E. The switch was not configured with an IP address or a default gateway.

A. The VLAN database was not erased.

Which three of these statements regarding 802.1Q trunking are correct? (Choose three.) A. 802.1Q native VLAN frames are untagged by default. B. 802.1Q trunking ports can also be secure ports. C. 802.1Q trunks can use 10 Mb/s Ethernet interfaces. D. 802.1Q trunks require full-duplex, point-to-point connectivity. E. 802.1Q trunks should have native VLANs that are the same at both ends.

A. 802.1Q native VLAN frames are untagged by default. C. 802.1Q trunks can use 10 Mb/s Ethernet interfaces. E. 802.1Q trunks should have native VLANs that are the same at both ends.

Refer to the exhibit. Which two statements are true about interVLAN routing in the topology that is shown in the exhibit? (Choose two.) A. Host E and host F use the same IP gateway address. B. Router1 and Switch2 should be connected via a crossover cable. C. Router1 will not play a role in communications between host A and host D. D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces. E. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit. F. The FastEthernet 0/0 interface on Router1 and the FastEthernet 0/1 interface on Switch2 trunk ports must be configured using the same encapsulation type.

D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces. F. The FastEthernet 0/0 interface on Router1 and the FastEthernet 0/1 interface on Switch2 trunk ports must be configured using the same encapsulation type.

Which statement about slow inter VLAN forwarding is true? A. The VLAN is experiencing slowness in the point-to-point collisionless connection. B. The VLANs are experiencing slowness because multiple devices are connected to the same hub. C. The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected. D. The entire VLAN is experiencing slowness. E. The VLANs are experiencing slowness due to a duplex mismatch.

E. The VLANs are experiencing slowness due to a duplex mismatch.

Which configuration can you apply to enable encapsulation on a subinterface? A. interface FastEthernet 0/0 encapsulation dot1Q 30 ip address 10.1.1.30 255.255.255.0 B. interface FastEthernet 0/0.30 ip address 10.1.1.30 255.255.255.0 C. interface FastEthernet 0/0.30 description subinterface vlan 30 D. interface FastEthernet 0/0.30 encapsulation dot1Q 30 ip address 10.1.1.30 255.255.255.0

D. interface FastEthernet 0/0.30 encapsulation dot1Q 30 ip address 10.1.1.30 255.255.255.0

Which protocol supports sharing the VLAN configuration between two or more switches? A. multicast B. STP C. VTP D. split-horizon

C. VTP

Which statement about DTP is true? A. It uses the native VLAN. B. It negotiates a trunk link after VTP has been configured. C. It uses desirable mode by default. D. It sends data on VLAN 1.

D. It sends data on VLAN 1.

While you were troubleshooting a connection issue, a ping from one VLAN to another VLAN on the same switch failed. Which command verifies that IP routing is enabled on interfaces and the local VLANs are up? A. show ip interface brief B. show ip nat statistics C. show ip statistics D. show ip route

A. show ip interface brief

Do ports in different VLANs share the same broadcast domain?

No. Ports in a VLAN share broadcasts, ports in different ones do not

What command is used to specify that DTP negotiation packets are not sent from the interface?

switchport nonegotiate

What happens if a port belongs to VLAN 5, and VLAN 5 is accidentally deleted?

The port becomes inactive and will not be functional until the missing VLAN 5 is created

What command is used to verify trunk establishment?

show interfaces trunk (no voice)

What is the main purpose of DTP?

to configure VLAN trunk ports automatically

What is the purpose of VTP updates from a VTP server?

distributes information about new VLANs defined in the VTP domain using a VTP notification

What command configures the port into permanent 802.1q trunk mode and negotiates with the connected device to convert the link to trunk mode?

switchport mode trunk

What command disables trunk mode and negotiates with the connected device to convert the link to nontrunk?

switchport mode access

What command triggers the port to negotiate the link from nontrunk to trunk mode. The port negotiates to a trunk port if the connected device is in trunk state, desirable state, or auto state. Otherwise, the port becomes a nontrunk port.

switchport mode dynamic desirable

What command enables a port to become a trunk only if the connected device has the state set to trunk or desirable. Otherwise, the port becomes a nontrunk port?

switchport mode dynamic auto

What is the normal VLAN range (stored in vlan.dat)?

1-1001

What is the extended VLAN range (stored in vlan.dat)?

1006-4094

What is the default native VLAN?

What command shows VLANs and the ports associated with them?

show vlan brief

What command shows voice and all vlans?

show interface [int #] switchport

When do changes get applied to VLANs after configuration?

Upon exiting VLAN configuration mode

What command configures trunk encapsulation

switchport trunk encapsulation dot1q

What command configures voice VLAN?

switchport voice vlan [vlan #]

You have configured a switched internetwork with multiple VLANs. You have configured a VLAN trunk using 802.1Q. You want to configure VLAN 3 as the native VLAN on the trunk. What command would you use?

switchport trunk native vlan 3

What command allows you to display the list of ports that are configured for trunking, the native VLAN for each trunk port, and the list of currently allowed VLANs for each trunk port?

show interfaces trunk

What additional command allows you to detect native VLAN mismatches?

show interfaces switchport

What command will configure which VLAN traffic will be allowed over the trunk link for VLAN 3?

switchport trunk allowed vlan 3

Your company's users are reporting that network application data from VLAN 20 to VLAN 10 is slower than usual. Applications that reside on VLAN 10 are operating normally. Similarly, applications that reside on VLAN 20 are operating normally for users who reside on VLAN 20. What VLAN performance category could this fall under?

slow interVLAN connectivity

This occurs when users who are directly connected to a given VLAN experience slowness on that VLAN as a whole.

slow intraVLAN

What are you most likely to connect to a Layer 2 switch to achieve interVLAN routing?

a router via trunk link with sub interfaces configured

Command used to disable DTP on a switch port that you intend to connect to an end user's workstation.

switchport mode access

What command in addition to switchport mode trunk places a port into permanent trunk mode?

switchport nonegotiate

You use VTP on your network. The VLAN configuration on SwitchA has recently changed. You want to discover which switch sent the changes. What command should you issue?

show vtp status

What command is useful for displaying statistical information about VTP, including the number of advertisements that were received and transmitted, the number of errors, and statistics relating to VTP pruning?

show vtp counters

What could be causing intraVLAN slowness?

A CPU that is being over utilized on a local switch

If a switch is placed into permanent trunk mode with the switchport mode trunk command, does it still send DTP frames?

Yes

What is most likely the cause of collision domain slowness?

malfunctioning NIC on an end-user workstation

How often are VTP advertisements flooded throughout the management domain?

Every 5 minutes

What three modes does VTP operate?

Server Client Transparent

What is the default VTP mode?

Server

When VTP ____ is enabled in a VTP domain, VTP client switches receive VTP update frames only for VLANs that are enabled on each switch.

pruning

VLANs are not propagated over the network until what is specified or learned?

domain name

When you change the VLAN configuration in this mode, the change only affects the local switch and does not propagate to other switches in the VTP domain. It still forwards advertisements.

Transparent

What commands allow you to verify configured VLANs?

show vlan show interfaces switchport

What command shows the VTP domain name, VTP operating mode, version running, and pruning status? Note: Will not show in running configuration

show vtp status

What command allows you to verify the VTP password? Note: Will not show in running configuration

show vtp password

What command corrects the VLAN membership if a port is assigned to the wrong VLAN?

switchport access vlan [#]

What command allows you to check the following: Local and peer native VLAN mismatch Trunk establishment between switches Desired VLANs are allowed on both sides of trunk link

show interfaces trunk

What command allows you to add, remove, or filter a VLAN on a trunk link?

switchport trunk allowed vlan [add / except / remove] vlan

What will an access port do with frames that are tagged with 802.1q protocol tags?

drop the packets

What kind of port typically carries traffic for a single VLAN unless a voice VLAN is also configured.

access

What VLANs are reserved for system use only. You cannot see or use these VLANs

0 4095

What range of VLANs are Cisco defaults for FDDI and Token Ring?

1002 - 1005

Internal VLANs are allocated from what VLAN range?

1006 - 4094

What command displays the VLANs that are used internally?

show vlan internal usage

In order to use the extended range of VLANs, what must you enable?

Extended system ID

Where is the vlan.dat file stored?

In nonvolatile memory (NVRAM)

Is VLAN configuration saved to the running or startup config?

No. Only in vlan.dat

When a new switch boots, if the VTP domain name and VTP mode in the startup config and vlan.dat file do not match, in what file does the switch use the configuration?

vlan.dat

You can use the interface configuration command mode to define the port membership mode and add and remove ports from a VLAN. Where are the results of these commands written to?

running-config file

What command allows you to verify whether a particular VLAN ID is in use?

show vlan id [#]

When you delete a VLAN, what happens to any LAN interfaces configured as access ports that were assigned to that VLAN?

They become inactive

What is the most common cause of a slow vlan?

traffic loop

If users report that VLAN traffic is slow, what are the three categories of possible causes with which you can begin troubleshooting?

slow collision domain connectivity slow broadcast domain connectivity slow interVLAN connectivity

Then the switch with the _____ revision number updates its VLAN configuration database to match the VLAN configuration database with the _____ revision number.

lower higher

A value advertised via VTP indicating the version of a switch's VLAN database, which gets incremented by one for every change made to that database.

Configuration Revision Number

How do you reset the configuration revision number to 0?

by toggling it to transparent mode

Switch A is configured with the default DTP mode of auto. Switch A and switch B are not-trunking. If you issued the show interfaces f0/5 trunk command on Switch B, what switch port modes are you likely to see in the command output on Switch B?

auto off

Unlike permanent trunk mode, DTP is disabled on the interface when it is placed into what mode?

access

Because each VLAN constitutes a unique network, a switch must maintain a unique _____ for each VLAN hosted on the switch.

bridging table

VLANs Flashcards

(106 cards)